WinFX CTP: Black Application Window

I really hate writing posts late at night as they always seem to drift onto the second page by the time anyone with answers comes online, but I do my best thinking in the earliest hours of the morning, and thats when I run into problems...

Anyways, I've got the December CTP of WinFX installed on my system. I originally had the incorrect installation order (VS before WinFX RTC) but I've uninstalled everything and reinstalled in the correct order. The problem now? Whenever I compile a simple WinFX application, the entire window area of the application is black. The border and title bar are the normal Windows XP border/title bar, but the content is just a black rectangle.

Also, if I get application crashes immediately after compilation if I throw a single ProgressBar object into a DockPanel. When I run the debugger, the problem seems to be caused by the BorderThickness property having a value of "Auto, 1, 1, 1" but I never set that property, so I'm assuming that this has something to do with Cider being thrown into this CTP.

Anyone else experienced this problem and found a work-around? I've searched the web a bit but the only thing I could find was a comment made to a blog post asking about this for the November CTP, but no answer was given from what I've seen. It'd be a shame if there were no work-around for this, as it means that I'm essentially out of commission for WPF development until the next CTP... unless I install the previous CTP release.

Just a little extra piece of information: XAML Pad runs perfectly fine. It displays all the WPF content, and I can throw any control into it and it doesn't complain.