Version: fs2_open_3_6_10r-20081023_r4911.exe
MediaVPs: 3.6.10
When an AI fighter is guarding a ship in an asteroid field, it destroys a threatening asteroid as it should, but, then it continues firing on into the empty space where the asteroid or asteroid fragments should be until the "object" leaves the field. Either that, or the AI just goes crazy on all asteroids and places where asteroids should be after the initial threatening asteroid is destroyed.
EDIT: Upon closer observation, it seems the AI will attack the space where the asteroid is supposed to be, had it not been destroyed, for eternity. In reality, this translates to a wing of ships shooting at a point in space that moves steadily further away from the mission area.
This is most certainly a mediaVP issue, as when I removed the mediaVPs, the mission ran fine with the AI behaving normally.
I hope this issue is resolved in the next MediaVP release, as progress on Relentless has ground to a halt due to this issue.