[mr.miyagi]

I thought this would be appropriate so people can share problems with the game and help one another like little angels.
I currently have nothing much to add here except changing my AGP aperture size in my BIOS from 64 to 128 seems to have really helped. My video card is a Radeon 9800 pro 128mb and now runs great without stutter or lag like its been doing recently.
If you do set yours, don't go under 64 or over 256mb, more info is at the 'Tweakguides' site.

Another thing to try, as mentioned in the Tweak is to delete all the files in your cache folder [don't delete the folder]. Its in My Documents/bf2/mods/bf2/cache

This is the place that stored all your previous/older graphical settings so is fine to delete. Choose your preferred setting then exit the game, delete the cache [will prolly be about 688 files] maybe reboot PC then play game. It'll do the optimize shader thing once but should help.