|Installed 2011-03 on a new machine today and tried a dist-upgrade. Failed to get past libc6 so reinstalled after much thrashing. This time, tried to upgrade just libc6 first and got the same error.
# apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
The following packages will be upgraded:
1 upgraded, 0 newly installed, 0 to remove and 761 not upgraded.
2 not fully installed or removed.
Need to get 0 B/4,335 kB of archives.
After this operation, 22.5 kB of additional disk space will be used.
Do you want to continue [Y/n]?
Preconfiguring packages ...
(Reading database ... 98053 files and directories currently installed.)
Preparing to replace libc6 2.13-24 (using .../libc6_2.13-29_amd64.deb) ...
dpkg: error processing /var/cache/apt/archives/libc6_2.13-29_amd64.deb (--unpack):
subprocess new pre-installation script returned error exit status 1
configured to not write apport reports
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)
Edit: Just noticed http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=669172. Waiting for 3.12-30...