Are you using the 184.108.40.206 recovery, via ROM Manager, or the old one that was floating around? Using the newest one from RM, I've had no trouble flashing 2.2 ROMs of any sort. I'll DL this and test tomorrow, but by them I'm sure someone (or yourself) will have tried it. See if it works with that new recovery though
HTC Inspire 4G (backup phone)
HTC Flyer 7". -Daughters Tablet
Samsung Galaxy Nexus - Wifes phone
HTC One - Current phone
Asus Nexus 7 - Current tablet
Edited for those complaining.