Damn battle.net disconects. I'm about 20 missions in to the campaign and 5 or 6 of my missions didn't get achievments because I disconected from battle.net while playing. I plan to play though again anyway on brutal and take alternate path choices, but its a little silly that I can't get achievments I earn due to a battle.net with connectivity issues.
Edit: Well, after the loss of connection to battle.net, I went to eat, when I came back and loaded up stacraft and logged back in, I went to campaign only to find the last 3 hours of work I have done vanished, so I have to go through several damn missions all over again. I'm starting to dislike these damn bugs, if I continued for longer, I could have potentially lost tons more of my gametime, all wasted.