I had been having problems with the market on almost every Froyo rom I tried. The Team Chaos ROM worked for a little while then wouldn't install anything after a little while and I've never been able to get it to work since even after wiping many times and re-installing.
I didn't have any luck with the first sapphire release 0.6.0 but 0.7.0 looked like it had some great new features so I gave it a go. Right out of the gate, it was fast, the market itself was slow, which I think is a market issue, not any of the ROMS, and things were installing without a hitch. I was happy as a clam that the issues I had been having seemed to go away, then, all of a sudden, one of my downloads got "stuck" and I wasn't able to install any more apps. I went to my backup, which was working when I did it, and that wouldn't work either. I did a total wipe 3x and re-installed, still wouldn't work. Tried Team Chaos again, same results. Went to BB 0.4, Kangerade 1.1, same issues. Wiped and went back to a 2.1 backup and all is good again.
I wish I could figure out what is causing this issue that keeps rearing it's ugly head. Judging from what I've read, it appears that many of you have had similar instances. Did anyone find out what was going wrong and come up with a fix? Must be something.