Is it just me, or is the Shivering Isles expansion on the PS3 GOTY Oblivion unplayable? I play on an HDTV, and the graphics, textures, and edges looking beyond terrible, like a PS2 game, and the FPS drops to like 10-15 whenever I'm fighting one guy outdoors, and stays at like 20-25 fps when I'm roaming. This seems to only be happening when I'm in Shivering Isles, Vanilla feels ok most of the time.
I hope Skyrim gets a constant stable FPS on consoles.
P.S., I always have a "Light 40" ring equipped on my guy, could the constant light be causing the low fps?