Looking at the stack trace it looks like a recursive opening of dialogs is happening (just a guess). The dialogs are modal I guess not much a user can do until the dialog is dismissed. Which is a bit hard to do I since they seem to crash. Couldn’t see any jme-classes in the stacktrace so a bit hard to tell why they show up.
The bug appears, if I debug a game in Fullscreen mode, or if I start any other Application (In this case Black Mesa) in Fullscreen mode, while jME SDK is running - WTF?
If its connected to other gl applications then its most probably your graphics drivers. If the error message changes each time the SDK will display each error the scene reports.