I just spent several infuriating days tracking down a nasty crash bug when starting SquawkBox 3. The search for the ultimate cause of this uncovered several other interesting problems. Thankfully, they all seem to be fixed now.
In other developments, implementation of multiplayer for Flight Simulator 2004 is underway. It is a non-trivial endeavour, considering that the way multiplayer works is completely different between FS 2002 and FS 2004. I hope to get it working soon, which should come as a relief to those testers who run FS 2004 exclusively.