I'm seeing this exception from time to time even in the latest build. Here's
a simple repro (not sure, however, that the only issue causes all these exceptions):
Try opening a huge project and press Alt-F4 while Re#er is still initializing.
You will get an exception. You may also get a standard message box indicating
that an ObjectDisposedException was thrown.
Seems like your progress indicator form can be closed by this key combination
regardless the operation mode (cancellable or non-cancellable).