Aperture 2 issue with preview and adjustments, secondary screen, etc

Hello,

I just recently installed Aperture 2.0, and I'm getting what seems to be a bug with previews and adjustments. When I try to adjust a file, I get a black screen as seen here: http://img91.imageshack.us/img91/6047/aperture2fd5.jpg

If I remove adjustments, it comes back.

Also, randomly a preview will be black, and I won't be able to view it.

More so, one time it looked like this: http://img255.imageshack.us/img255/8053/apertureji3.jpg

I had enabled it to view on my second monitor, and it crashed. It also seems like it takes a lot longer for it to do things in Aperture 2.0...It seems like it takes a lot longer than it should for exporting images (I export as full res PNG).

Do you guys have any suggestions? Should I convert all my images to RAW 2.0? Is this a bug and I need to wait to see if there is an update?

My system specs are as follows:
Mac Pro 8-Core 3GHz
16GB RAM
1900XT
2600XT
2 x 24" LCD's (Driven off 1900xt)
42" 1080P LCD (driven off 2600xt)
Motu Ultralite
JBL LSR4328P's
OS X 10.5.2

And my pics come from a Canon 5D and 20D 🙂

Thanks in advance for any help!