Firstly (Tony), apologies if this has been covered before as I can't seem to find this one in the FAQ or by searching.

It's not in the FAQ because I didn't know about it. This is news to me.

How certain are you that this is by design and not just a flaw on your unit? Can you give a description or photos of exactly what the problem is with your unit? Something to check... are you sure that the RCAs that you say are floating are really the rear output RCAs and not the aux-in RCA's?

It's definitely a FAQ-able item if it turns out to be true.