http://bugs.winehq.org/show_bug.cgi?id=16592
--- Comment #20 from Paul Vriens Paul.Vriens.Wine@gmail.com 2009-01-17 14:42:27 --- If you look through the sequences of GetDriveTypeA's you will see that it always looks for A:,B:,C:,D:,E: and another letter. This other letter goes from 'F' to 'Z' and guess what comes after ascii 'Z', yep '['. We return '1', maybe we shouldn't? Not sure if this is an issue but I will write a test for this (tomorrow though).
And guess what comes after '[', yes '' indeed, which gives us ':'. Don't know if this is a longshot but it sure looks suspicious.