I would guess those are data transmission errors - the ACD we have writes errors to syslog and complains about, among other things: corrupted data coming in to one of an array of sockets. Usually the system requests a retransmit, and things go ahead. This sounds more "fatal" like repeated data corruption.

I would start reading the admin manual for the application. Now. Just in case something is starting to go South, it'd be useful to know what the heck is happening. Especially if you are responsible for it.