Sorry buddy, but the frame rate fluctuation as it is at the start of the game (with patch 1.3) is acceptable. And it is the price to pay for having the v-synch enabled to avoid tearing. Which is fine to me. I can deal with 15-20 fps once in a while. It isn't that disturbing.
The main issue we are experiencing, and that people wrongly call it "frame rate drops" is lag/stuttering/hangup. It can't be a frame rate drop when opening the user menu i have to wait seconds before it shows up because it is autosaving. This is for sure a problem inherent to disc I/O and memory management. It seems like after the game save size grows above a certain limit and/or we continuously play the game for hours the system (PS3) wastes time allocating/swapping resources putting on hold (queue) anything else. Visually it looks like a frame rate drop, but in reality it is more like a short hang. I get the same thing when my computer starts hitting the virtual memory.
But it's true, the two things are probably intermixed as well. With the original frame rate drop issue that has been fixed (at least I started the game with 1.3 and I didn't notice anything major) and the game save/memory issue still cursing the PS3 game. Which in my case is becoming more and more apparent now after 1-2 or more hours. Especially in Whiterun where most of my stuff is stored.


