On the FastE - we are seeing Output drops. They were at a constant
interval, when we were running IOS c7200-p-mz.123-9a. As per cisco,
upgraded the IOS to c7200-p-mz.123-10 because of a possible buffer
Have you tried using a more stable IOS, like 12.2 GD? Or are you
required to use 12.3? It might be enlightening to try 12.2 to see if at
least some of these issues go away, particularly the bus errors.