@AS -- here's the output of the command ls -l /usr/lib/libGL.*
-rw-r--r-- 1 root root 663 Feb 12 00:32 /usr/lib/libGL.la
lrwxrwxrwx 1 root root 10 Feb 12 00:32 /usr/lib/libGL.so -> libGL.so.1*
lrwxrwxrwx 1 root root 18 Feb 12 00:32 /usr/lib/libGL.so.1 -> libGL.so.260.19.29*
-rwxr-xr-x 1 root root 758308 Feb 12 00:32 /usr/lib/libGL.so.260.19.
^^ Looks like the .29 is up there... (cause of mismatch)
... where are the symbolic links to libGL.so ?
Ummm... I'm not sure I understand your question. How do I search for those symbolic links? 
This isn't right because /usr/lib/libGL.so.1 should not be linked to libGL.so.260.19.29* unless you once ran the Nvidia installer downloaded from their website instead of using the dkms packages in our repo at some point in the past.
I would delete /usr/lib/libGL.so /usr/lib/libGL.so.1 and whatever the last one is as it is cut off. /usr/lib/libGL.so.260.19.

Then I would install libmesagl1-7.5.2-1pclos2010.i586.rpm from Synaptic.
After than I would remove
dkms-nvidia-current
dkms-nvidia96xx
x11-driver-video-nvdia173
x11-driver-video-nvidia96xx
x11-driver-video-current
nvidia173-doc-html
nvidia96xx-doc-html
Then go back and install dkms-nvidia-current and x11-driver-video-current.
From here I could go into the PCLinuxOS Control Center -> Hardware ->Configure Video card and select the video card again to it can relink back to the proper GL libs.
Goodluck.