MessageBox MB_ICONQUESTION in Vista RC1?

what happened with MB_ICONQUESTION in Vista RC1? No icon appears at all (an ugly blank space appears instead)

In the documentation it states that the OS will continue to support this icon for backwards compatibility:

http://windowssdk.msdn.microsoft.com/en-us/library/ms645505.aspx

Thanks

[465 byte] By [Ted.] at [2007-12-24]