Index: CKEditor/trunk/CHANGES.html
===================================================================
--- CKEditor/trunk/CHANGES.html	(revision 5578)
+++ CKEditor/trunk/CHANGES.html	(revision 5579)
@@ -57,4 +57,5 @@
 		<li><a href="http://dev.fckeditor.net/ticket/5732">#5732</a> : If it isn't possible to connect to the SCAYT servers the dialogs might hang in Firefox. Fix for Firefox>=3.6.</li>
 		<li><a href="http://dev.fckeditor.net/ticket/5807">#5807</a> : [FF2] New page command results in uneditable document.</li>
+		<li><a href="http://dev.fckeditor.net/ticket/5772">#5772</a> : [IE] Some numbered list style types are not supported by IE6/7 and causes JavaScript error.</li>
 	</ul>
 	<h3>
Index: CKEditor/trunk/_source/plugins/liststyle/dialogs/liststyle.js
===================================================================
--- CKEditor/trunk/_source/plugins/liststyle/dialogs/liststyle.js	(revision 5578)
+++ CKEditor/trunk/_source/plugins/liststyle/dialogs/liststyle.js	(revision 5579)
@@ -93,4 +93,25 @@
 		else if ( startupPage == 'numberedListStyle'  )
 		{
+
+			var listStyleOptions =
+			[
+				[ editor.lang.list.notset, '' ],
+				[ editor.lang.list.lowerRoman, 'lower-roman' ],
+				[ editor.lang.list.upperRoman, 'upper-roman' ],
+				[ editor.lang.list.lowerAlpha, 'lower-alpha' ],
+				[ editor.lang.list.upperAlpha, 'upper-alpha' ],
+				[ editor.lang.list.decimal, 'decimal' ]
+			];
+
+			if ( !CKEDITOR.env.ie || CKEDITOR.env.version > 7 )
+			{
+				listStyleOptions.concat( [
+					[ editor.lang.list.armenian, 'armenian' ],
+					[ editor.lang.list.decimalLeadingZero, 'decimal-leading-zero' ],
+					[ editor.lang.list.georgian, 'georgian' ],
+					[ editor.lang.list.lowerGreek, 'lower-greek' ]
+				]);
+			}
+
 			return {
 				title : editor.lang.list.numberedTitle,
@@ -128,17 +149,5 @@
 										id : 'type',
 										style : 'width: 100%;',
-										items :
-										[
-											[ editor.lang.list.notset, '' ],
-											[ editor.lang.list.armenian, 'armenian' ],
-											[ editor.lang.list.georgian, 'georgian' ],
-											[ editor.lang.list.lowerRoman, 'lower-roman' ],
-											[ editor.lang.list.upperRoman, 'upper-roman' ],
-											[ editor.lang.list.lowerAlpha, 'lower-alpha' ],
-											[ editor.lang.list.upperAlpha, 'upper-alpha' ],
-											[ editor.lang.list.lowerGreek, 'lower-greek' ],
-											[ editor.lang.list.decimal, 'decimal' ],
-											[ editor.lang.list.decimalLeadingZero, 'decimal-leading-zero' ]
-										],
+										items : listStyleOptions,
 										setup : function( element )
 										{