1. The sound doesn't play well during stormy/rainy weather. Especially explosions and gunfire don't make the correct sound. In this case, I have to type a 'sunny weather' cheat.
2.Sometimes, the sound suddenly stops playing completely(regardless of weather) and I have to reload to make it play again.
3. Seldom, the mouse doesn't work properly: I can look around, but I can't browse through my weapons using scroll wheel. In this case, if I jump from a high place or bail from an aircraft while flying high enough and I have a parachute in my inventory, CJ won't do the skydiving animation and will continue falling just as if he didn't have the parachute. Once again, I am forced to reload to get rid of this problem.
These bugs don't ruin the fun of playing San Andreas as they occur too rarely for me to worry about them(I mean bugs 2 and 3) and I can easily fix them when they happen. Still, I'm wondering what's causing them.