diff --git a/application/forms.class.inc.php b/application/forms.class.inc.php
index e8cbe785d..205ed056b 100644
--- a/application/forms.class.inc.php
+++ b/application/forms.class.inc.php
@@ -881,7 +881,7 @@ class DesignerTextField extends DesignerFormField
 		$this->sValidationPattern = $sValidationPattern;
 	}
 
-	public function SetForbiddenValues($aValues, $sExplain)
+	public function SetForbiddenValues($aValues, $sExplain, $bCaseSensitive = true)
 	{
 		$aForbiddenValues = $aValues;
 		
@@ -893,7 +893,7 @@ class DesignerTextField extends DesignerFormField
 			
 		}
 		
-		$this->aForbiddenValues[] = array('values' => $aForbiddenValues, 'message' => $sExplain);
+		$this->aForbiddenValues[] = array('values' => $aForbiddenValues, 'message' => $sExplain, 'case_sensitive' => $bCaseSensitive);
 	}
 	
 	public function Render(WebPage $oP, $sFormId, $sRenderMode='dialog')
diff --git a/js/property_field.js b/js/property_field.js
index fc4ce76a4..64c484113 100644
--- a/js/property_field.js
+++ b/js/property_field.js
@@ -487,11 +487,24 @@ function ValidateWithPattern(sFieldId, bMandatory, sPattern, sFormId, aForbidden
 		{
 			for(j in aForbiddenValues[i].values)
 			{
-				if (aForbiddenValues[i].values[j] == currentVal)
+				if (aForbiddenValues[i].case_sensitive)
 				{
-					bValid = false;
-					sMessage = aForbiddenValues[i].message;
-					break;	
+					if (aForbiddenValues[i].values[j] == currentVal)
+					{
+						bValid = false;
+						sMessage = aForbiddenValues[i].message;
+						break;	
+					}
+				}
+				else
+				{
+					if (aForbiddenValues[i].values[j].toUpperCase() == currentVal.toUpperCase())
+					{
+						bValid = false;
+						sMessage = aForbiddenValues[i].message;
+						break;	
+					}
+					
 				}
 			}
 		}