After applying the update published today (vs_update.exe, file version 11.0.50323, date 2012-04-07) the VS 11 help viewer no longer works. When I try to start it from the start menu or from within VS11 the splash screen shows but then a message box pops up with the error "A content file required by the Help Viewer is missing or has been corrupted".
Visual Studio/Team Foundation Server/.NET Framework Tooling version
Steps to reproduce
Operating System Language