can't load library

["B. Bell" <maximill@u.washington.edu>]

when i try to start x i get the following errors:
$ startx
xauth: can't load library 'libXmu.so.6'
xinit: can't load library 'libXmu.so.6'

what exactly does it mean by 'can't load library' - because:
$ ls -l /usr/X11R6/lib/libXmu.so.*
lrwxrwxrwx   1 root     root           13 Nov 19 15:04
/usr/X11R6/lib/libXmu.so.6 -> libXmu.so.6.0
-rwxr-xr-x   1 root     root        68156 Oct 17 22:11
/usr/X11R6/lib/libXmu.so.6.0

this error only happened after upgrading to libc6, which i did by 
following the instructions in the mini-howto.  does this mean i have to
upgrade all of X also?

brad



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