When I try to fire up the tuxdaemon I get the following error:

./tuxdaemon: /lib/libc.so.6: version `GLIBC_2.4' not found (required by ./tuxdaemon)

what gives?

I have fedore core 4 with glibc-2.3.6, which should be okay.

I have glibc-2.5 here. I have no idea what could create that dependency on glibc-2.4.
You don't have any problem with tuxup?

Actually glibcc is the GNU C standard library. We also use Glib which is the GTK+ and gnome library but for threads only, I don't think your problem comes from here.

Now on fedora, remi reported that the Glib libraries were not in the INCLUDE path and the Makefile was using relative paths so it could not really compile at another path. That's corrected on svn, maybe you can give it a shot though I'm not convinced that will fix your problem. Doesn't cost much to try it out anyway.