Blank message box when starting SQL Server Management Studio

A couple of my colleagues were having a problem when starting Management Studio. Everytime the application started it would show a blank messagebox with just an OK button. Apparently this can be caused by installing the .NET Framework 1.1 (or one of it's updates) after the .NET Framework 2.0.

The SQL Server 2005 readme has the solution (although the problem description is not exactly the same - it seems to help in this case too):

1. In Control Panel, open Add or Remove Programs.
2. Click Microsoft .NET Framework 2.0.
3. Click Change/Remove.
4. Click Repair, and then click Next.
5. When the repair is completed, restart the computer if you are prompted to do this