Hmmm... "interesting quality"? I never got any problem reports from you Hans, I'd remember ;-) Currently, freshrpms plays well with Fedora Extras, and the only bug that existed was my fault, having merged a version of liboil in Extras that was too recent for the one I had held back in freshrpms because of my swfdec build (Extras has an older one), but was fixed.
I have to agree with Matthias. I've never had any problems playing with freshrpms packages and fedora core or extras.