Hi Joel,
How do you deal with this problem, because presumably not every test contributor has VMs ready to confirm the behaviour of 95, 98, ME, 2000, XP and Vista. Do I submit the patch as-is, in the knowlege that it will cause failures in old windows? Presumably not - so what do you suggest I do?
That's what we generally end up doing. Watching test.winehq.org for test results once a patch gets committed, or waiting for an email from someone who watches the results, is a way to get feedback on test failures on other platforms.
The alternative is to ask someone to test your tests on other platforms, by asking on wine-devel as you've done.
Cheers, --Juan