And no, that is not a typo. PS3 owners have been having issues with Skyrim's frame-rate. Once your save file becomes bigger than 5.5MB, certain areas of the game really stutter. Bethesda released a patch which provided a small incremental improvement, but it wasn't enough to eliminate the problem. Now it's back to the drawing board, but a fix won't be ready for the next patch (1.3).
Apparently it's because the team hasn't been able to isolate what is causing the issue.
"Right now we know it's not one thing, but a combination of smaller ones that some folks are seeing, but others are not," claimed a post made in the Bethesda Blog. "Some seem to be the PS3 autosaving in the background (you can turn that off), some may be SPU AI updates, and some may relate to dynamic system memory allocation.
"These fixes are not in the current 1.3 update that is in final testing, but will be in future ones."
"We understand how frustrating it can be when your game is having issues, and we thank all of you for your continued feedback and patience. Rest assured we take your gameplay experience seriously and will continue working on this until it's resolved."
Hopefully that resolution will come sooner rather than later.
Skyrim — what we’re working on (Updated) [Bethesda]