so we just finished a show with 2 mac pro servers ( 8core/4core Macpros) with Decklink HD Extreme cards
signal was SDI feed ran through a DA, another 150' cable run, through another DA then to each server.
both servers on capture would show random red flashes (not at the same time...) capture was set at 10bit NTSC.

turning capture on/off seemed to make the problem go away for a bit but it would be back again.

A call to Blackmagic gave us nothing.

Thoughts?

-s