Please use the enhanced ESP Ghostscript instead of the standard GNU Ghostscript as base for the package. ESP Ghostscript is based on GNU Ghostscript and enhances it with several patches: - new build system (autoconf-based) - pstoraster for CUPS - some other enhancements for CUPS Since CUPS is now becoming more and more the standard printer daemon including better support for it is a good thing. The guys at Easy Software have done their job constantly and adopted new releases of GNU Ghostscript instantly. It is available at http://www.cups.org/ghostscript.html
GNU Ghostscript is also autoconf-based now, although our build hasn't been adapted to use it yet (it's quite large job).
It also seems like GNU gs 7.05 included in RH 8.0 has some problems with type2 CID-keyed fonts (truetype fonts wrapped as CID-keyed fonts). ESP ghostscript 7.05(as included in Mandrake 9.0) has no problem with them and this is another reason to switch to ESP ghostscript. See bug 78788.
No, just another bug. I don't see any reason to switch, to be honest.