THIS EXACT THING HAPPENS TO ME. Sorry, got a little excited, but I have this same problem. It's not a huge mechanical problem/big deal, but it does get a little annoying and I'd like to know what's wrong. It seems to be worse when the car is cold, like when i first start it up and pull out, it seems to take the longest to catch 3rd gear, then when it's warmer it does a lot better, but still a noticable slip. I've been told that the hydrolic pressure may need to be increased or something, but I don't know much about it myself. I'd like to know if anyone else has this problem and has had it diagnosed or fixed.