Hover problem with 1.8.6 CSS UI themes

[giorrrgio]

It seems that with new jquery UI 1.8.6 css themes the hover of the panel collapse/fold button breaks up, as you can see in this example:
http://pastehtml.com/view/1bxmjup.html

With the same ui custom theme you use in the demo page, everything is working fine.

[idlesign]

There has been a certain progress towards major plugin rewrite recently. I'll fix that one there. Thank you.