Not seen that before - doesn't look good...
But interesting that you are getting anything at all - so it does point to something input related - either card or source.
Can you create a system profile before you change anything - both catalyst profile and system profile:
(System Profiler / File / Save AS... / XML)
Active silicon will want this for support.
Have you removed re card and swapped to another pci slot - and re-I stalled drivers?
Best to contact active silicon support directly for further help
TIP:
to protect you investment and input cards - it is wise to use video isolators on video inputs that connect to other systems, especially if not sharing the same power, or where there is a danger of cables coming in to contact with other high voltage equipment.
There are a number of isolators available in the market for both SD/HD-SDI and Composite ranging from £100-£300 for single or multiple input devices.
S