Syntax highlighting stops working after "</style>" when the style contain a string like ".submit:hover"
This seems to be fixed by this version of the HTML edit mode: https://raw.github.com/marchaefner/jEdit-modes/master/html.xml (Installation details can be found in the Users Guide.)
(The patch is waiting here: https://sf.net/support/tracker.php?aid=3614699 )
Yes, it is fixed by your edit mode. Thanks.
Fixed in svn revision 23418.