I'm playing through the campaign in multiplayer with a friend of mine. We got to "Mystery of the Trinity" and ran into a bug.
Shortly after the mission starts, you can see in the distance straight ahead that there's a fight going on, with what looks like flak cannon effects and explosions. (weird that they're not obscured by fog) Soon after this someone says the Trinity's been destroyed, and I'm told to return to base... whereupon I'm told the mission was successful and I did a great job against harsh odds... the whole mission is over in probably less than a minute.
If it matters, we're playing through the missions individually rather than through the "campaign" mode.
Setup for both of us is:
FS2 Open 3.7.0 RC2
MediaVPs_3612 installed
Launcher 5.5g
Windows 7 x64