As not everyone gets onto the general discussion forum I thought I'd point out this thread (http://www.rx8forum.com/showthread.php?s=&threadid=10303) which looks like a bit of a design floor on the RX8. Not sure there's much that we can do about it. Hopefully the leather will be affected less by this.

I usualy have my seat well leaned back so hopefully wont have the problem, but I would have though there will be an easy way to avoid the problem somehow?

A possible solution

http://www.holbros.com/prod.asp?catsub=Seat%20Belt%20Pads&all=no.

http://www.rmcarspares.co.uk/acatalog/RM_CarSpares_SPARCO_Seat_Belt_Pads_553.html

Civic type R has a smilair problem