Would you mind sending me a copy of your show file? I can't replicate any of these issues on my machine, so hopefully taking a look at your show can shed some light on this.
Also, it's crashing to the desktop without an error message due to a bug in the error handling system that was introduced in the last patch. It's been resolved in the 0.3.0.6, which will be pushed in the next couple days.
just an update.. I made a new file, then made a cue.. if I double click on the cue (out of habbit) I get dumped to the desktop.. this is the error in the log
DefaultSource Critical 3 Object reference not set to an instance of an object. Unhandled Exception.