are you doing a lot of heavy curls, too? I get forearm splints when I go heavy on curls for too long and notice it when I'm benching. I've found that benching doesn't necessarily cause the splints but I feel them when I rack the weight after benching.
On that note with the curls.... if I warm up with some light weight high rep seated incline drag curls....real concentrated for two sets to fill the biceps with blood.....then...go to those Jim Stoppanni seated BB curls to eliminate the forearm and blast the bicep only....after that you can throw pretty much anything at the bicep without killing the forearm andyou can shred the bicep with lighter weight if you like at that point and get just as much accomplished.