gobirds895:
What method are you using when installing new Roms?
If Clockwork, are you doing a full backup and wipe?
It sounds like you may have gone from 2.1 to Froyo 2.2 FRF57 for example without doing a full wipe of the cache. Pete and others have warned that you should do a full wipe on his roms if comming from 2.1 or another developers rom, when updating to Froyo.
I uploaded and installed Petes newest FRF84B Froyo V0.4 and had zero problems comming from his Froyo (may have been FRF57, can't remember) V0.1 which was also incredibly stable. And on this particular update I only selected backup. (ClockWork Method)
That being said I upgraded the stock kernal on Petes FRF84B to Chevyno1, 1.1 GHZ ULV and had some issues with rebooting, do to what I think was excessive heat. When I backed the speed back down to 900MHZ, all became stable, and max temps per SetCpu have been about 95* . The best processor speed per quadrant has been about 1300 on this build at this setting. I did get some scores above 1400 on 1GHZ setting but it obviously wasn't worth it.
The only market issue I have at the moment is with downloading Google Maps", updates. I'm not to worried about this as I'm sure Pete will get that fixed soon.
Another suggestion, if you have ClockWork, get the paid version. I also use the fix permissions option on Petes Rom Section when I get more than a couple of Forceclose events. I also don't use the Forceclose option when the box pops up unless the "Wait" option can't resolve it.
I hope things get worked out for you soon..