Unlike this guy, I can launch the Worms Reloaded demo from Steam on my Windows 7 64-bit machine just fine.
However, once I get into the demo, all the menus act as if I'm holding down the down arrow (or some similar key). I know this is not the case because I'm not touching either my keyboard or mouse, and according to other programs, no key events are being sent. I don't know if this has any effect once I start playing, because I could barely configure my team. Any help would be appreciated.