I am currently in a game as a player, running Maptool in Windows 8 and so far it is working flawlessly.
This PC was an in place upgrade from Win7 to Win8. All apps (java and MT) were previously installed before the upgrade.
Anyway, I thought I'd share this good news.
Windows 8 Consumer Preview
Moderators: dorpond, trevor, Azhrei
Windows 8 Consumer Preview
How to use my bundled artwork (MT1.3B60+): http://forums.rptools.net/viewtopic.php?f=8&t=11759
Re: Windows 8 Consumer Preview
Cool, good to hear.