Mazor: It -looks- like you have a video driver issue that I got a couple times. You may wish to try this and see if it changes anything though copying the other .so didn't seem to. If not, I suppose it was worth a shot, eh?
This is what I did the couple times I got that error:
(Assuming you have backups of your stuff just in case!) Open konsole, and do the following (assuming you have sudo rights. If not, su root instead and do so). I am assuming you have an nvidia card for this example:
sudo emerge nvidia-drivers nvidia-settings nvidia-cg-toolkit (hehe, you can ignore cg toolkit I suppose)
sudo eselect opengl set nvidia
That will hopefully fix the libGL weirdness. As far as I can tell, that problem was caused by bad linking of the libGL.so file at some point, the system being confused as to what to load correctly because there are several copies of it. But take that explanation with a grain of salt
I've gotten something similar just about every version I've installed or reinstalled of Sab since 3.3, particularly after video driver updates or some mystery installation that triggered it which I later determined with reasonable confidence was me being a moron and overwriting nvidia-settings. hehe.