diff --git a/core/inlineimage.class.inc.php b/core/inlineimage.class.inc.php
index 7b6297410..05b75ddc8 100644
--- a/core/inlineimage.class.inc.php
+++ b/core/inlineimage.class.inc.php
@@ -176,26 +176,32 @@ class InlineImage extends DBObject
 			$sOQL = 'SELECT InlineImage WHERE temp_id = :temp_id';
 			$oSearch = DBObjectSearch::FromOQL($sOQL);
 			$oSet = new DBObjectSet($oSearch, array(), array('temp_id' => $sTempId));
+            $aInlineImagesId = array();
 			while($oInlineImage = $oSet->Fetch())
 			{
+                $aInlineImagesId[] = $oInlineImage->GetKey();
 				$oInlineImage->SetItem($oObject);
 				$oInlineImage->Set('temp_id', '');
 				$oInlineImage->DBUpdate();
 			}
+            IssueLog::Trace('FinalizeInlineImages (see $aInlineImagesId for the id list)', 'InlineImage', array(
+                '$sObjectClass' => get_class($oObject),
+                '$sTransactionId' => $iTransactionId,
+                '$sTempId' => $sTempId,
+                '$aInlineImagesId' => $aInlineImagesId,
+                '$sUser' => UserRights::GetUser(),
+                'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+            ));
 		}
-// For tracing issues with Inline Images... but beware not all updates are interactive, so this trace happens when creating objects non-interactively (REST, Synchro...)
-// 		else
-//		{
-//			IssueLog::Error('InlineImage: Error during FinalizeInlineImages(), no transaction ID for object '.get_class($oObject).'#'.$oObject->GetKey().'.');
-//
-//			IssueLog::Error('|- Call stack:');
-//			$oException = new Exception();
-//			$sStackTrace = $oException->getTraceAsString();
-//			IssueLog::Error($sStackTrace);
-//
-//			IssueLog::Error('|- POST vars:');
-//			IssueLog::Error(print_r($_POST, true));
-//		}
+        else
+        {
+            IssueLog::Trace('FinalizeInlineImages "error" $iTransactionId is null', 'InlineImage', array(
+                '$sObjectClass' => get_class($oObject),
+                '$sTransactionId' => $iTransactionId,
+                '$sUser' => UserRights::GetUser(),
+                'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+            ));
+        }
 	}
 	
 	/**
@@ -208,10 +214,18 @@ class InlineImage extends DBObject
 		$sOQL = 'SELECT InlineImage WHERE temp_id = :temp_id';
 		$oSearch = DBObjectSearch::FromOQL($sOQL);
 		$oSet = new DBObjectSet($oSearch, array(), array('temp_id' => $sTempId));
+        $aInlineImagesId = array();
 		while($oInlineImage = $oSet->Fetch())
 		{
+            $aInlineImagesId[] = $oInlineImage->GetKey();
 			$oInlineImage->DBDelete();
 		}
+        IssueLog::Trace('OnFormCancel', 'InlineImage', array(
+            '$sTempId' => $sTempId,
+            '$aInlineImagesId' => $aInlineImagesId,
+            '$sUser' => UserRights::GetUser(),
+            'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+        ));
 	}
 	
 	/**
@@ -548,6 +562,61 @@ EOF
 JS
 		;
 	}
+
+    protected function AfterInsert()
+    {
+        IssueLog::Trace(__METHOD__, 'InlineImage', array(
+            'id' => $this->GetKey(),
+            'expire' => $this->Get('expire'),
+            'temp_id' => $this->Get('temp_id'),
+            'item_class' => $this->Get('item_class'),
+            'item_id' => $this->Get('item_id'),
+            'item_org_id' => $this->Get('item_org_id'),
+            'secret' => $this->Get('secret'),
+            'user' => $sUser = UserRights::GetUser(),
+            'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+            'REQUEST_URI' => @$_SERVER['REQUEST_URI'],
+        ));
+
+	    parent::AfterInsert();
+    }
+
+    protected function AfterUpdate()
+    {
+        IssueLog::Trace(__METHOD__, 'InlineImage', array(
+            'id' => $this->GetKey(),
+            'expire' => $this->Get('expire'),
+            'temp_id' => $this->Get('temp_id'),
+            'item_class' => $this->Get('item_class'),
+            'item_id' => $this->Get('item_id'),
+            'item_org_id' => $this->Get('item_org_id'),
+            'secret' => $this->Get('secret'),
+            'user' => $sUser = UserRights::GetUser(),
+            'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+            'REQUEST_URI' => @$_SERVER['REQUEST_URI'],
+        ));
+
+	    parent::AfterUpdate();
+    }
+
+    protected function AfterDelete()
+    {
+        IssueLog::Trace(__METHOD__, 'InlineImage', array(
+            'id' => $this->GetKey(),
+            'expire' => $this->Get('expire'),
+            'temp_id' => $this->Get('temp_id'),
+            'item_class' => $this->Get('item_class'),
+            'item_id' => $this->Get('item_id'),
+            'item_org_id' => $this->Get('item_org_id'),
+            'secret' => $this->Get('secret'),
+            'user' => $sUser = UserRights::GetUser(),
+            'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+            'REQUEST_URI' => @$_SERVER['REQUEST_URI'],
+        ));
+
+	    parent::AfterDelete();
+    }
+
 }
 
 
diff --git a/pages/UI.php b/pages/UI.php
index a67630b50..0c9dc110e 100644
--- a/pages/UI.php
+++ b/pages/UI.php
@@ -912,7 +912,16 @@ HTML
 			$sTransactionId = utils::ReadPostedParam('transaction_id', '', 'transaction_id');
 			if ( empty($sClass) || empty($id)) // TO DO: check that the class name is valid !
 			{
-				throw new ApplicationException(Dict::Format('UI:Error:2ParametersMissing', 'class', 'id'));
+                IssueLog::Trace('Object not updated (empty class or id)', $sClass, array(
+                    '$operation' => $operation,
+                    '$id' => $id,
+                    '$sTransactionId' => $sTransactionId,
+                    '$sUser' => UserRights::GetUser(),
+                    'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+                    'REQUEST_URI' => @$_SERVER['REQUEST_URI'],
+                ));
+
+                throw new ApplicationException(Dict::Format('UI:Error:2ParametersMissing', 'class', 'id'));
 			}
 			$bDisplayDetails = true;
 			$oObj = MetaModel::GetObject($sClass, $id, false);
@@ -921,16 +930,34 @@ HTML
 				$bDisplayDetails = false;
 				$oP->set_title(Dict::S('UI:ErrorPageTitle'));
 				$oP->P(Dict::S('UI:ObjectDoesNotExist'));
+
+                IssueLog::Trace('Object not updated (id not found)', $sClass, array(
+                    '$operation' => $operation,
+                    '$id' => $id,
+                    '$sTransactionId' => $sTransactionId,
+                    '$sUser' => UserRights::GetUser(),
+                    'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+                    'REQUEST_URI' => @$_SERVER['REQUEST_URI'],
+                ));
 			}
 			elseif (!utils::IsTransactionValid($sTransactionId, false))
 			{
-				//TODO: since $bDisplayDetails= true, there will be an redirection, thus, the content generated here is ignored, only the $sMessage and $sSeverity are used afeter the redirection 
+				//TODO: since $bDisplayDetails= true, there will be an redirection, thus, the content generated here is ignored, only the $sMessage and $sSeverity are used afeter the redirection
 				$sUser = UserRights::GetUser();
 				IssueLog::Error("UI.php '$operation' : invalid transaction_id ! data: user='$sUser', class='$sClass'");
 				$oP->set_title(Dict::Format('UI:ModificationPageTitle_Object_Class', $oObj->GetRawName(), $sClassLabel)); // Set title will take care of the encoding
 				$oP->p("<strong>".Dict::S('UI:Error:ObjectAlreadyUpdated')."</strong>\n");
 				$sMessage = Dict::Format('UI:Error:ObjectAlreadyUpdated', MetaModel::GetName(get_class($oObj)), $oObj->GetName());
 				$sSeverity = 'error';
+
+				IssueLog::Trace('Object not updated (invalid transaction_id)', $sClass, array(
+					'$operation' => $operation,
+					'$id' => $id,
+					'$sTransactionId' => $sTransactionId,
+					'$sUser' => UserRights::GetUser(),
+					'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+					'REQUEST_URI' => @$_SERVER['REQUEST_URI'],
+				));
 			}
 			else
 			{
@@ -943,9 +970,31 @@ HTML
 					$oP->set_title(Dict::Format('UI:ModificationPageTitle_Object_Class', $oObj->GetRawName(), $sClassLabel)); // Set title will take care of the encoding
 					$sMessage = Dict::Format('UI:Class_Object_NotUpdated', MetaModel::GetName(get_class($oObj)), $oObj->GetName());
 					$sSeverity = 'info';
+
+                    IssueLog::Trace('Object not updated (see either $aErrors or IsModified)', $sClass, array(
+                        '$operation' => $operation,
+                        '$id' => $id,
+                        '$sTransactionId' => $sTransactionId,
+                        '$aErrors' => $aErrors,
+                        'IsModified' => $oObj->IsModified(),
+                        '$sUser' => UserRights::GetUser(),
+                        'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+                        'REQUEST_URI' => @$_SERVER['REQUEST_URI'],
+                    ));
 				}
 				else
 				{
+                    IssueLog::Trace('Object updated', $sClass, array(
+                        '$operation' => $operation,
+                        '$id' => $id,
+                        '$sTransactionId' => $sTransactionId,
+                        '$aErrors' => $aErrors,
+                        'IsModified' => $oObj->IsModified(),
+                        '$sUser' => UserRights::GetUser(),
+                        'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+                        'REQUEST_URI' => @$_SERVER['REQUEST_URI'],
+                    ));
+
 					try
 					{
 						if (!empty($aErrors))
@@ -1118,6 +1167,14 @@ HTML
 		$aWarnings = array();
 		if ( empty($sClass) ) // TO DO: check that the class name is valid !
 		{
+            IssueLog::Trace('Object not created (empty class)', $sClass, array(
+                '$operation' => $operation,
+                '$sTransactionId' => $sTransactionId,
+                '$sUser' => UserRights::GetUser(),
+                'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+                'REQUEST_URI' => @$_SERVER['REQUEST_URI'],
+            ));
+
 			throw new ApplicationException(Dict::Format('UI:Error:1ParametersMissing', 'class'));
 		}
 		if (!utils::IsTransactionValid($sTransactionId, false))
@@ -1125,6 +1182,14 @@ HTML
 			$sUser = UserRights::GetUser();
 			IssueLog::Error("UI.php '$operation' : invalid transaction_id ! data: user='$sUser', class='$sClass'");
 			$oP->p("<strong>".Dict::S('UI:Error:ObjectAlreadyCreated')."</strong>\n");
+
+            IssueLog::Trace('Object not created (invalid transaction_id)', $sClass, array(
+                '$operation' => $operation,
+                '$sTransactionId' => $sTransactionId,
+                '$sUser' => UserRights::GetUser(),
+                'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+                'REQUEST_URI' => @$_SERVER['REQUEST_URI'],
+            ));
 		}
 		else
 		{
@@ -1155,11 +1220,30 @@ HTML
 			{
 				if (!empty($aErrors) || !empty($aWarnings))
 				{
+                    IssueLog::Trace('Object not created (see $aErrors)', $sClass, array(
+                        '$operation' => $operation,
+                        '$sTransactionId' => $sTransactionId,
+                        '$aErrors' => $aErrors,
+                        '$sUser' => UserRights::GetUser(),
+                        'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+                        'REQUEST_URI' => @$_SERVER['REQUEST_URI'],
+                    ));
+
 					throw new CoreCannotSaveObjectException(array('id' => $oObj->GetKey(), 'class' => $sClass, 'issues' => $aErrors));
 				}
 
 				$oObj->DBInsertNoReload();// No need to reload
 
+                IssueLog::Trace('Object created', $sClass, array(
+                    '$operation' => $operation,
+                    '$id' => $oObj->GetKey(),
+                    '$sTransactionId' => $sTransactionId,
+                    '$aErrors' => $aErrors,
+                    '$sUser' => UserRights::GetUser(),
+                    'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+                    'REQUEST_URI' => @$_SERVER['REQUEST_URI'],
+                ));
+
 				utils::RemoveTransaction($sTransactionId);
 				$oP->set_title(Dict::S('UI:PageTitle:ObjectCreated'));
 
diff --git a/pages/ajax.render.php b/pages/ajax.render.php
index f10099aa1..25910adde 100644
--- a/pages/ajax.render.php
+++ b/pages/ajax.render.php
@@ -1020,7 +1020,18 @@ try
 			{
 				$bReleaseLock = iTopOwnershipLock::ReleaseLock($sObjClass, $iObjKey, $sToken);
 			}
-			break;
+
+            IssueLog::Trace('on_form_cancel', $sObjClass, array(
+                '$iObjKey' => $iObjKey,
+                '$sTransactionId' => $iTransactionId,
+                '$sTempId' => $sTempId,
+                '$sToken' => $sToken,
+                '$sUser' => UserRights::GetUser(),
+                'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+                'REQUEST_URI' => @$_SERVER['REQUEST_URI'],
+            ));
+
+            break;
 
 		case 'dashboard':
 			$oPage->SetContentType('text/html');
@@ -2649,6 +2660,17 @@ EOF
 							$aResult['width'] = $aDimensions['width'];
 							$aResult['height'] = $aDimensions['height'];
 						}
+
+                        IssueLog::Trace('InlineImage created', 'InlineImage', array(
+                            '$operation' => $operation,
+                            '$aResult' => $aResult,
+                            'secret' => $oAttachment->Get('secret'),
+                            'temp_id' => $sTempId,
+                            'item_class' => $sObjClass,
+                            'user' => UserRights::GetUser(),
+                            'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+                            'REQUEST_URI' => @$_SERVER['REQUEST_URI'],
+                        ));
 					}
 					else
 					{
@@ -2689,6 +2711,16 @@ EOF
 					$oAttachment->Set('contents', $oDoc);
 					$oAttachment->Set('secret', sprintf('%06x', mt_rand(0, 0xFFFFFF))); // something not easy to guess
 					$iAttId = $oAttachment->DBInsert();
+
+                    IssueLog::Trace('InlineImage created', 'InlineImage', array(
+                        '$operation' => $operation,
+                        'secret' => $oAttachment->Get('secret'),
+                        'temp_id' => $sTempId,
+                        'item_class' => $sObjClass,
+                        'user' => UserRights::GetUser(),
+                        'HTTP_REFERER' => @$_SERVER['HTTP_REFERER'],
+                        'REQUEST_URI' => @$_SERVER['REQUEST_URI'],
+                    ));
 				}
 
 			} catch (FileUploadException $e)