Yesterday's patch release for GTA IV's PC version brought new problems for some users, such as a stuck key/input issue that leaves your head spinning. For real. Rockstar's suggested a fix.
GTAForums are alive with complaints of unresolved bugs, even new ones, so if you're seeing the same kinds of things, you're probably not alone. However, the look/spin issue is the only one Rockstar's commenting on so far.
