Some of these issues are covered here:
http://forum.ppcgeeks.com/showthread.php?t=46521
I'm running 6.1 20755 with very few problems. The WMP/TCPMP Apache going to sleep after a few minutes problem is fixed by a simple Registry edit. GGuruusa have a very effective fix for this.
You said "the latest" - do you mean 20931? If so, that release is very large, perhaps due to the new WMP. That is one reason that I went back to 20755.
Did you select the HTC Camera app when you cooked your ROM?