Using skins that have a dark hover color for tabs, like Ares & Stealth OS, hovering over the tabs on the sides and bottom of Visual Studio 2008, when using auto hidden panels, the text of the tabs remain black, and so become unreadable. Tabs in other programs behave fine, they get white text in hover, while the tab background becomes dark transparent blue.

Using SQL Profiler, text on the grid while database activity is shown on a grid, get a dark blue background with black text, instead of white text. This happens with lots of dark skins.

On firefox the skinned buttons on sites, including Stardock forums keep black text on hover, again are hard to read. Buttons elsewhere get a white text on hover over. Using the latest WindowBlinds beta just released today.