I've been having a few CTDs and bad lag since the patch, I never had any problems before.
But on a different note, another thing EA have done with the 1.3 patch is disable all unlocks on unranked servers. It might not sound like much, but nearly all clan matches are fought on unranked servers. no one can use their unlocks, which might sound like it evens the playing field, but most people in clans have got plenty of unlocks, and prefer using them than the standard weapons. It's a right bugger for me as I always use the unlocks when playing on normal servers, so in clan matches I have to play with a gun I'm not used to.
There is NO reason for EA to have removed the unlocks. It is just another shot in the face to clans, who have also had the squad leader spawning messed up. Do they not want people to play in clans or something? Playing in clans is the best way to play BF2 how it was meant to be played (proper squadwork and commanding etc.), but EA just want to ruin it for everyone