Inspired by various Planet Debian postings, I've spent some time recently looking into a few RC bugs to help with the Squeeze release.
mpg123-el #581227 A previous commenter on this bug suggested a proposed fix, which I tested and uploaded. I think the bug's severity was inflated to begin with, so I downgraded the bug as well.
doclifter #580246 This one had to do with the python2.6 transition. I pointed out a patch against Ubuntu's version of the package that fixes this problem, and someone else made an NMU based on that. (Seemed like a good idea to look in the PTS for Ubuntu patches since Ubuntu always transitions to newer Python before Debian proper.)
gnuvd #580110 I checked upstream and a new version that's supposed to fix this bug was released today, so I updated the bug report to make note of this and give the maintainer a chance to look at it.
libtommath #583820 This FTBFS bug was caused by a previous NMU that fixed a different FTBFS and also made some unrelated changes. I sent a message to the previous NMUer noting this fact and made a new upload fixing the new FTBFS.
fceu #580820 Needs new upstream packaged to fix. The maintainer seems pseudo-MIA but has shown some signs of returning to activity; I sent an email inquiring as to whether he intends to fix the critical issue in this package.
op-panel #582377 and #571427 These were not merged when I started out, so I merged them after noticing they were the same. I spent some poking at the bug itself and made a simple patch, only to find out that there was a pending patch in pkg-voip's subversion repo. I hopped onto #debian-voip to prod the person who'd prepared the patch in subversion about the importance of updating the BTS when working on bugs. These bugs are currently blocking on testing the patch.
Most all of these bugs I've subscribed to in case of follow-up. (Geez, challenge-response subscription via email is kind of a pain.)