BlackBerry Simulator mysteriously dying every time you try to fire it up on Vista? Same here. It’s a good thing I’ve become a compulsive reader of release notes. From the the latest JDE 4.6.0 docs:
If you install the BlackBerry® Java® Development Environment on a computer with Windows Vista™, if Use Account Control is turned on, launching the BlackBerry® Smartphone simulator might produce error messages and the simulator might not start.
Translation: Simulator will definitely. not. start. And of course they mean User Access Control. How-To Geek has an easy way to kill UAC here.