Thunderbird lighning not working after upgrade from 9.04 to 9.10

[_loof_]

Hi all

I did a dist-upgrade today. Everything went good till I wanted to check my calendar in thunderbird. No caldendars anymore at all...

http://www.mozilla.com/en-US/thunderbird/system-requirements.html tells us, that glibc 2.3.2 is required.

I already had this after the upgrade to 9.04. I could fix it by installing glibc-2.10-1.

Now i tryed the same thing but now aptitude tells me:



Note, selecting libc6 instead of glibc-2.10-1
libc6 is already the newest version.


im not a very experienced linux user... and this is my first question in a forum since my start of linux 2 years ago ;)

so I really dont if I could get real troubles by uninstalling libc6 and installing glibc instead... what should i do???