This has been going on since day 1 of the release of skyrim 11Nov11 and is now 100x's worse after the release of the DLC's. Is this a Bethesda issue or a hardware issue for PS3. Game is unplayable. When will it be fixed. I know I am not the only one with this issue.
First of all, this belongs in the "Elder Scrolls series" section
But to answer your question: YES
Its Bethesda having trouble from day one porting it to the PS3. The PS3 version of Skyrim has had the most problems.
That being said, they were for the most part fixed...and the lag is nowhere near as bad as it was from the first released version.
If you have a significantly large game save (10MB+) that causes texture drops and framrate problems.
Disable auto-save, and dont hoard stuff, and move stuff around in dungeons if you can help it at all. The game keeps track of these forever, which accounts for some of the gradual growth in save files through continued play.