All games have glitches/bugs.
Bethesda is currently working on the issue for the PS3.
A crappy porting job, improper rendering path, and lack of optimization resulting in an inherently unstable fps is not a glitch or a bug. All Bethesda's working on is trying to fix that variable issue that can eventually turn performance on the PS3 version to an unplayable low, but a patch they hastily whip together in a couple months is not going to be able nor is it stated to be to improve the graphical distribution, base rendering code, and lack of optimization for the PS3 version which, right out of the box, never manages to stay at 30 fps except in some very small interiors such as a house. Out of the box, it fluctuates, depending on region, between 15 and 30 fps, though never staying at 30. That is not some small glitch or bug and no, usually games aren't so crappily optimized as to run that poorly on a console.