I' running Drupal 7 on a localhost (xampp).
In regard to version numbers, every thing I'm talking about was the latest production version available today (3/4/13).
I've added AdaptiveTheme to my Drupal installation and, per the instructions, created a subtheme for it (not their Footheme but just their generic subtheme like they describe in the installation notes).
Here's the problem:
1) I set the Adaptive subtheme as the default
2) Using the "home" button (in the administrative menu) I go to my site's front page.
3) Then, if you choose "appearance" from the administrative menu (to return to the themes page), the whole menu bar starts to flicker rendering it inoperable.
You can get it to stop flickering by closing out the window that that holds the admin task you are trying to do.
Once the above scenario has started, the flickering affects the menu bar when trying to accomplish any type of administrative task.
I get this same effect with Firefox (19.0) and Chrome (Version 25.0.1364.97 m), I don't seem to get it with IE.
This is all on a Windows 7 machine. I'm using Seven as the administrative theme. Setting AT Admin as the the administrative theme does not solve the problem.
Setting another theme, like Bartik or even Adaptive Core, as the default rectifies the problem. The problem returns when the Adaptive subtheme is returned to default.