I figured to start a thread so not to hijack the WFX 3.0 release thread. I realize the taskbar preview should show on top, but it isn't. Testing an idea here though.
Ummm ok that's weird. I thought I'd try something to see why it wasn't working. I thought perhaps it was due to having WMP miniplayer in the taskbar. I maximized it and things worked fine for the taskbar preview. Minimizing WMP back to the taskbar as the taskbar player didn't change things. Taskbar preview still worked.
It might be tied to it somehow though, because it stopped working again, but I brought WMP back up and it was fine again.