We can ask our tech who totes a Mac to test this when he comes in tomorrow, but did you try just restarting Chrome? Our current Admin is built in Flash, and Chrome uses the very same Flash plugin that Safari does, so I'm wondering if maybe your Flash plugin started misbehaving (like any other app might do), in which case quitting it and restarting (by quitting and restarting the browser using it) should resolve the problem. You might also want to make sure you're running the most current Flash plugin:
http://get.adobe.com/flashplayer/