I was testing this build with Joel last week. The good news is it is now public information that two major fixes have been made in 3.0.5 of Squawkbox.
“Some excellent news. The plane visibility bug that first appeared in version 3.0.4 has been fixed. As well, the stutters and hangs that a number of users have experienced since SquawkBox 3’s original release appear to also be resolved. They are a lot harder to reproduce though, so a small group of testers is testing the fix to confirm that it no longer occurs.
Both of these fixes will be rolled into the upcoming 3.0.5 patch release. After a bit more testing, the patch should be ready for public release.”
Be sure to update when it is released!