upgrading testing?

[Wilhelm Fitzpatrick <rafial@well.com>]

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