diff --git a/application/applicationcontext.class.inc.php b/application/applicationcontext.class.inc.php
index a82553ef3..1f0fe8e94 100644
--- a/application/applicationcontext.class.inc.php
+++ b/application/applicationcontext.class.inc.php
@@ -118,7 +118,7 @@ class ApplicationContext
 						$oSearchFilter = new DBObjectSearch('Organization');
 						$oSearchFilter->SetModifierProperty('UserRightsGetSelectFilter', 'bSearchMode', true);
 						$oSet = new CMDBObjectSet($oSearchFilter);
-						$iCount = $oSet->Count();
+						$iCount = $oSet->CountWithLimit(2);
 						if ($iCount == 1)
 						{
 							// Only one possible value for org_id, set it in the context
diff --git a/application/cmdbabstract.class.inc.php b/application/cmdbabstract.class.inc.php
index 2d8b548ad..a2a7e2654 100644
--- a/application/cmdbabstract.class.inc.php
+++ b/application/cmdbabstract.class.inc.php
@@ -1768,11 +1768,11 @@ EOF
 				case 'LinkedSet':
 					if ($oAttDef->IsIndirect())
 					{
-						$oWidget = new UILinksWidget($sClass, $sAttCode, $iId, $sNameSuffix, $oAttDef->DuplicatesAllowed(), $aArgs);
+						$oWidget = new UILinksWidget($sClass, $sAttCode, $iId, $sNameSuffix, $oAttDef->DuplicatesAllowed());
 					}
 					else
 					{
-						$oWidget = new UILinksWidgetDirect($sClass, $sAttCode, $iId, $sNameSuffix, $aArgs);
+						$oWidget = new UILinksWidgetDirect($sClass, $sAttCode, $iId, $sNameSuffix);
 					}					
 					$aEventsList[] ='validate';
 					$aEventsList[] ='change';
@@ -2045,7 +2045,7 @@ EOF
 			$LockEnabled = MetaModel::GetConfig()->Get('concurrent_lock_enabled');
 			if ($LockEnabled) 
 			{
-				$sOwnershipToken = utils::ReadPostedParam('ownership_token', null, false, 'raw_data');
+				$sOwnershipToken = utils::ReadPostedParam('ownership_token', null, 'raw_data');
 				if ($sOwnershipToken !== null)
 				{
 					// We're probably inside something like "apply_modify" where the validation failed and we must prompt the user again to edit the object
@@ -2357,8 +2357,9 @@ EOF
 				{
 					if ($oAttDef->IsExternalKey())
 					{
+						/** @var DBObjectSet $oAllowedValues */
 						$oAllowedValues = MetaModel::GetAllowedValuesAsObjectSet($sClass, $sAttCode, $aArgs);
-						if ($oAllowedValues->Count() == 1)
+						if ($oAllowedValues->CountWithLimit(2) == 1)
 						{
 							$oRemoteObj = $oAllowedValues->Fetch();
 							$oObj->Set($sAttCode, $oRemoteObj->GetKey());
@@ -2395,7 +2396,7 @@ EOF
 		$sOwnershipToken = null;
 		if ($LockEnabled) 
 		{
-			$sOwnershipToken = utils::ReadPostedParam('ownership_token', null, false, 'raw_data');
+			$sOwnershipToken = utils::ReadPostedParam('ownership_token', null, 'raw_data');
 			$aLockInfo = iTopOwnershipLock::AcquireLock($sClass, $iKey);
 			if ($aLockInfo['success'])
 			{
@@ -2476,8 +2477,9 @@ EOF
 					{
 						if ($oAttDef->IsExternalKey())
 						{
+							/** @var DBObjectSet $oAllowedValues */
 							$oAllowedValues = MetaModel::GetAllowedValuesAsObjectSet($sClass, $sAttCode, $aArgs, '', $this->Get($sAttCode));
-							if ($oAllowedValues->Count() == 1)
+							if ($oAllowedValues->CountWithLimit(2) == 1)
 							{
 								$oRemoteObj = $oAllowedValues->Fetch();
 								$this->Set($sAttCode, $oRemoteObj->GetKey());
@@ -3883,7 +3885,7 @@ EOF
 			$bResult = (count($aErrors) == 0);
 			if ($bResult)
 			{
-				list($bResult, $aErrors) = $oObj->CheckToWrite(true /* Enforce Read-only fields */);
+				list($bResult, $aErrors) = $oObj->CheckToWrite();
 			}
 			if ($bPreview)
 			{
diff --git a/application/displayblock.class.inc.php b/application/displayblock.class.inc.php
index 98caa513c..26aba4b25 100644
--- a/application/displayblock.class.inc.php
+++ b/application/displayblock.class.inc.php
@@ -594,7 +594,7 @@ class DisplayBlock
 				}
 				if (count($aAuthorizedClasses) > 0)
 				{
-					if($this->m_oSet->Count() > 0)
+					if($this->m_oSet->CountWithLimit(1) > 0)
 					{
 						$sHtml .= cmdbAbstractObject::GetDisplayExtendedSet($oPage, $this->m_oSet, $aExtraParams);
 					}
@@ -613,7 +613,7 @@ class DisplayBlock
 			else
 			{
 				// The list is made of only 1 class of objects, actions on the list are possible
-				if ( ($this->m_oSet->Count()> 0) && (UserRights::IsActionAllowed($this->m_oSet->GetClass(), UR_ACTION_READ, $this->m_oSet) == UR_ALLOWED_YES) )
+				if ( ($this->m_oSet->CountWithLimit(1)> 0) && (UserRights::IsActionAllowed($this->m_oSet->GetClass(), UR_ACTION_READ, $this->m_oSet) == UR_ALLOWED_YES) )
 				{
 					$sHtml .= cmdbAbstractObject::GetDisplaySet($oPage, $this->m_oSet, $aExtraParams);
 				}
@@ -668,7 +668,7 @@ class DisplayBlock
 			case 'links':
 			//$bDashboardMode = isset($aExtraParams['dashboard']) ? ($aExtraParams['dashboard'] == 'true') : false;
 			//$bSelectMode = isset($aExtraParams['select']) ? ($aExtraParams['select'] == 'true') : false;
-			if ( ($this->m_oSet->Count()> 0) && (UserRights::IsActionAllowed($this->m_oSet->GetClass(), UR_ACTION_READ, $this->m_oSet) == UR_ALLOWED_YES) )
+			if ( ($this->m_oSet->CountWithLimit(1) > 0) && (UserRights::IsActionAllowed($this->m_oSet->GetClass(), UR_ACTION_READ, $this->m_oSet) == UR_ALLOWED_YES) )
 			{
 				//$sLinkage = isset($aExtraParams['linkage']) ? $aExtraParams['linkage'] : '';
 				$sHtml .= cmdbAbstractObject::GetDisplaySet($oPage, $this->m_oSet, $aExtraParams);
@@ -1702,7 +1702,7 @@ class MenuBlock extends DisplayBlock
 				// Do not perform time consuming computations if there are too may objects in the list
 				$iLimit = MetaModel::GetConfig()->Get('complex_actions_limit');
 				
-				if ((count($aStates) > 0) && (($iLimit == 0) || ($oSet->Count() < $iLimit)))
+				if ((count($aStates) > 0) && (($iLimit == 0) || ($oSet->CountWithLimit($iLimit + 1) < $iLimit)))
 				{
 					// Life cycle actions may be available... if all objects are in the same state
 					//
diff --git a/core/dbobject.class.php b/core/dbobject.class.php
index 598fed8f7..cc55628e8 100644
--- a/core/dbobject.class.php
+++ b/core/dbobject.class.php
@@ -2939,7 +2939,7 @@ abstract class DBObject implements iDisplay
 					$oSearch->AllowAllData();
 				}
 				$oSet = new CMDBObjectSet($oSearch);
-				if ($oSet->Count() > 0)
+				if ($oSet->CountExceeds(0))
 				{
 					$aDependentObjects[$sRemoteClass][$sExtKeyAttCode] = array(
 						'attribute' => $oExtKeyAttDef,
diff --git a/core/dbobjectset.class.php b/core/dbobjectset.class.php
index 8c6fecc6e..1d88f52f5 100644
--- a/core/dbobjectset.class.php
+++ b/core/dbobjectset.class.php
@@ -570,7 +570,7 @@ class DBObjectSet implements iDBObjectSetIterator
 		$aAttributes = array();
 		foreach ($aAliases as $sAlias => $bClassDirection)
 		{
-			foreach (MetaModel::GetOrderByDefault($this->m_oFilter->GetClass($sAlias)) as $sAttCode => $bAttributeDirection)
+			foreach (MetaModel::GetOrderByDefault($this->m_oFilter->GetClass()) as $sAttCode => $bAttributeDirection)
 			{
 				$bDirection = $bClassDirection ? $bAttributeDirection : !$bAttributeDirection;
 				$aAttributes[$sAlias.'.'.$sAttCode] = $bDirection;
@@ -728,16 +728,72 @@ class DBObjectSet implements iDBObjectSetIterator
 		return $this->m_iNumTotalDBRows + count($this->m_aAddedObjects); // Does it fix Trac #887 ??
 	}
 
+	/** Check if the count exceeds a given limit
+	 * @param $iLimit
+	 *
+	 * @return bool
+	 * @throws \CoreException
+	 * @throws \MissingQueryArgument
+	 * @throws \MySQLException
+	 * @throws \MySQLHasGoneAwayException
+	 */
 	public function CountExceeds($iLimit)
 	{
-		$sSQL = $this->m_oFilter->MakeSelectQuery(array(), $this->m_aArgs, null, null, $iLimit + 2, 0, true);
-		$resQuery = CMDBSource::Query($sSQL);
-		if (!$resQuery) return (0 > $iLimit);
+		if (is_null($this->m_iNumTotalDBRows))
+		{
+			$sSQL = $this->m_oFilter->MakeSelectQuery(array(), $this->m_aArgs, null, null, $iLimit + 2, 0, true);
+			$resQuery = CMDBSource::Query($sSQL);
+			if ($resQuery)
+			{
+				$aRow = CMDBSource::FetchArray($resQuery);
+				CMDBSource::FreeResult($resQuery);
+				$iCount = intval($aRow['COUNT']);
+			}
+			else
+			{
+				$iCount = 0;
+			}
+		}
+		else
+		{
+			$iCount = $this->m_iNumTotalDBRows;
+		}
 
-		$aRow = CMDBSource::FetchArray($resQuery);
-		CMDBSource::FreeResult($resQuery);
+		return ($iCount > $iLimit);
+	}
 
-		return (intval($aRow['COUNT']) > $iLimit);
+	/** Count only up to the given limit
+	 * @param $iLimit
+	 *
+	 * @return int
+	 * @throws \CoreException
+	 * @throws \MissingQueryArgument
+	 * @throws \MySQLException
+	 * @throws \MySQLHasGoneAwayException
+	 */
+	public function CountWithLimit($iLimit)
+	{
+		if (is_null($this->m_iNumTotalDBRows))
+		{
+			$sSQL = $this->m_oFilter->MakeSelectQuery(array(), $this->m_aArgs, null, null, $iLimit + 2, 0, true);
+			$resQuery = CMDBSource::Query($sSQL);
+			if ($resQuery)
+			{
+				$aRow = CMDBSource::FetchArray($resQuery);
+				CMDBSource::FreeResult($resQuery);
+				$iCount = intval($aRow['COUNT']);
+			}
+			else
+			{
+				$iCount = 0;
+			}
+		}
+		else
+		{
+			$iCount = $this->m_iNumTotalDBRows;
+		}
+
+		return $iCount;
 	}
 
 	/**