Ghost Recon: Future Soldier. A bug report thread on the Ubisoft forums is cluttered with complaints, ranging from the mundane to the catastrophic. For example, one issue seems to be that the mouse doesn't work. Like, at all.
It would appear Ubisoft is aware of the issues. Donna Nicholson, part of the PMS clan, said she's passing the info along to the higher-ups. We've also contacted Ubisoft about the matter, and are currently awaiting a statement.
Update: An Ubisoft rep has told Joystiq that the company is "aware of the issues with the PC version" and the company is currently "working aggressively to correct them as soon as possible."