I have had some serious issues with rom manager the past 2 days.
I get stuck at the " M " also.........can not boot into cw.
Ok this is the only workaround I have found to work for me. Just flash spr. then reboot..........then re-flash cw and reboot. That has worked for me but its a major pain in the butt!
O BTW I am now running CM rc-1 and trying to put 928's theme for it on.
Recently, RM/CW has had lots of issues. The developer has recommended flashing between CW and SPR. If that does not resolve the issue then go here http://www.droidforums.net/forum/koush/38233-real-time-irc-support-click-here.html and speak with the developer and his team.
The only reason I installed RM/CW was to learn the process and help with rescue squad issues. I choose to keep the alternative recovery of RM, SPRecovery, flash because that works best for me.
Mike