Nope, Firefox 14.0.1, I am using the beta. I found out though that if I tell Windowblinds not to skin Firefox, I have all kinds of issues with Firefox, like transparent titlebars and missing titlebar buttons in every skin I tried. They function, but they are not visible unless you left click in the general area. Turning the menus in Firefox on and off really messes things up too, right cclicking in the toolbar area to turn them back on acts like a rollup and you play hell trying to get the menus back on.. If I apply the Windows Aero skin though, all the issues go away. So it is a problem with the latest release of Windowblinds for sure.