I've noticed for awhile now that pretty much everything in testing is held back when I go to do an apt-get upgrade. Today, as an emperiment, I tried to manually apt-get install libc6 to break through the log jam, and ulitimately I got this error:
E: This installation run will require temporarily removing the essential package libnss-db due to a Conflicts/Pre-Depends loop. This is often bad, but if you really want to do it, activate the APT::Force-LoopBreak option. E: Internal Error, Could not early remove libnss-db Should I go ahead and do as suggested, or am I going to hose my system? -raf