Are you using Windows XP by any chance? It's not intentional, but we did come across this a while ago. If it's the same thing, it appears to be a Java bug when running (I think Java 7) on XP. If you haven't already, I'd try grabbing the latest version of the JDK.
Windows 7 Home Premium, 64 bits
But I'll try grabbing the latest version of JDK and see if the 7u9 JDK will help.
Addendum: Seems like that did it. Thank you very much.