Comment 28 for bug 204128

To test this bug wubi-selfextract.exe (rev 503) has to be on a CD. Running wubi.exe from hard disk will always work (thus invalidating the test)

At the time of writing rev 495 ships with the CD, until wubi is updated on the daily ISO, you will need to create your own CD by unpacking, replacing wubi.exe and packing back the ISO, then burning the CD.

That also requires vista with latest patches, since it is the only set-up that triggered the problem in the first place