Just tried this with no joy although it did seem to do something - some windows refused to go up from any switch for about 30 seconds! Thought I'd be getting wet for a minute there but they're now all up.
I've already had the passenger controls off and cleaned them with contact cleaner with no difference, but I'll do the same with rear controls just in case. It's very odd this, I can't think of a single point of failure.
Also, if I hit the driver window-lockout control while windows are moving then they stop in place, so I think that button works as expected.