Here is my story: In order to make the ssh package working, glibc-2.2.4 was needed...
So I downloaded the 2.2.5 version (latest), started the installation (just a little library, it will be easy!), then got the glic-linuxthread needed by glibc, install again, waited 15min untill it's over...

Now ssh is working (yipiiie!!!) but tons of others apps stop working.
Some apps now refuse to start (like gaim or Xmms) and give me this error msg : error while loading shared libraries: /usr/local/lib/libpthread.so.0: undefined symbol: _dl_cpuclock_offset

What is THIS? I'm running crazy!

I suppose glibc-linuxthread isn't supported by some apps and it's why they don't work, but I really don't know what to do now. I can't downgrade my glibc, I already tried (2 or 3 times!), I always got the same errors no matter the version. I cannot install linuxthread (who is provinding ibpthread.so.0) alone without glibc, it won't compile, I suspect because my version of glib isn't supported by this progs.
I also tried reinstalling each buggy apps too but no succes

Any help whould be greatly appreciate

ever find a solution to this? I am having the same problem...grrrr

Ahh, I solved it -- get the latest slack packaged glibc 2.2.5 and glibc-libso 2.2.5. Go in as root, and removepkg both of those (if they are installed, if not remove the old ones, if you have a foreign compiled glibc installed just skip this step, as the slack packages will overwrite, I found). At this point you won't be able to boot into linux any longer (gasp). Boot off of your slack distro cd, and mount your root partition (if u don't know how, just type "pkgtool" and follow the bouncing dot). cd to /mnt/usr/local/lib and rm libpthread* --this gets rid of what is causing the real problems (don't forget the "*" after libpthread, there are a bunch of em). Type pkgtool and navigate to wherever you saved those most recent versions of the slack packaged glibc's...install em and you are all fixed up.
GL