Index: /CKEditor/trunk/_source/plugins/styles/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/styles/plugin.js	(revision 6383)
+++ /CKEditor/trunk/_source/plugins/styles/plugin.js	(revision 6384)
@@ -520,5 +520,5 @@
 							// check if the parent itself can be added completelly
 							// to the range, otherwise apply the style immediately.
-							while ( applyStyle = !includedNode.getNext( notBookmark )
+							while ( ( applyStyle = !includedNode.getNext( notBookmark ) )
 								&& ( parentNode = includedNode.getParent(), dtd[ parentNode.getName() ] )
 								&& ( parentNode.getPosition( firstNode ) | CKEDITOR.POSITION_FOLLOWING | CKEDITOR.POSITION_IDENTICAL | CKEDITOR.POSITION_IS_CONTAINED ) == ( CKEDITOR.POSITION_FOLLOWING + CKEDITOR.POSITION_IDENTICAL + CKEDITOR.POSITION_IS_CONTAINED )