Cisco Switch input errors with AT&T BiB Router

We have Cisco 3750-24-PS-S connected to a AT&T BiB router. We have 4 access ports connected to it on 4 different VLANs.

The errors we are seeing are as follows...

• input errors (via show int fa0/1, etc)

• CRC errors (via show int fa0/1, etc)

• runts (via show int fa0/1, etc)

• undersize frames, FCS errors and "valid frames ,too small" (via show controllers ethernet-controller fastEthernet 0/1, etc)

...ever increasing for the past year and a half. I've gone through escalated support with AT&T several times and each time, they continually state that they don't see any errors on the BiB router or the Cienna box. We've swapped switches/switch models, cables, ports, set speed/duplex to auto/auto, 100/full (per their suggestion).

Anything we plug into the BiB router sees those errors.

It doesn't seem to have affected our connectivity. But I would think that we shouldn't be seeing continuous errors, right?

Anyone else experience this? Other ideas?