The Battle.net Forums have some posts from players of StarCraft II: Wings of Liberty who are distressed to find that they have lost progress when playing the single-player campaign in the just-released real-time strategy sequel. There are reports of lost saved games, both local and cloud-based, as well as the failure to receive properly earned achievements. The common thread seems to be problems with being properly logged into Battle.net while playing, with the service not displaying any warnings. A Blizzard representative has posted questions and suggestions, but at this point exactly what's going wrong is not clear. Thanks IncGamers.