Customers have been offered KB937061 for Visual Studio 2005 Service Pack 1 from Microsoft Update when they have already installed it. The Microsoft Security Response Center blog has more information about the problem and what they have done to fix it.
In the latest WiX v3 drops a new element is supported to configure transform validation bits. The default is still 0x0922001f but you can now configure them. Torch.exe was also modified to accept transform validation bits using the same flags as msitran.exe in the Windows Installer SDK,
Transforms can change just about anything in an installation package – even the code page. Transforms can also add and drop both tables and columns but they cannot, however, change the column type. This is true for patches as well, since a patch package contains transforms.