Well, basically if I'd noticed a problem I'd do something about it, but for whatever reason I've never had any problem with front / rear reversals. Sometimes the center seems to do too good a job of nailing dialog down, for instance if two people are conversing while walking down the street toward you it might be nice to have a bit of left center and right center, not purely so but a bit of directional hinting. But there's not much I can do about that.

My current system has other issues that are real and more pressing, including early reflections and time alignment as two outstanding examples. Once I can treat and correct those I'll either stop and enjoy the music or maybe find something new to worry about.