I've been on Froyo since the first leak.
Have the newest baseband. and have never had any issues till BB Froyo.
2 data and 2 cache wipes, with BB Froyo .zip install, and p3droid 1.25ghz kernel.
Everything works fine till it starts to install all my apps from the market. Then my lock button stops working on top of the phone. If I hold it for a really long time it will let me shut it off but just pressing the button doesn't lock the screen.
EDIT: seems like the issue comes and goes. Weird.