When I run r-c-xfree86 on a freshly installed severn system yum'ed to today's
rawhide, it segfaults when I first try to configure X:

[root@yoshimi root]# redhat-config-xfree86
/usr/share/redhat-config-xfree86/redhat-config-xfree86: line 2:  1959 Segmentati
on fault      python2.2 /usr/share/redhat-config-xfree86/xconf.py $@
[root@yoshimi root]# 

This is with 
redhat-config-xfree86-0.9.6-1

Hardware is:

[root@yoshimi root]# lspci
00:00.0 Host bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333]
00:01.0 PCI bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333 AGP]
00:0b.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] (rev 78)
00:0d.0 Unknown mass storage controller: Promise Technology, Inc. 20265 (rev 02)
00:0e.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8233 PCI to ISA Bridge
00:11.1 IDE interface: VIA Technologies, Inc.
VT82C586A/B/VT82C686/A/B/VT8233/A/C/VT8235 PIPC Bus Master IDE (rev 06)
00:11.2 USB Controller: VIA Technologies, Inc. USB (rev 1b)
00:11.3 USB Controller: VIA Technologies, Inc. USB (rev 1b)
00:11.4 USB Controller: VIA Technologies, Inc. USB (rev 1b)
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon R250 If [Radeon
9000] (rev 01)
01:00.1 Display controller: ATI Technologies Inc Radeon R250 [Radeon 9000]
(Secondary) (rev 01)
[root@yoshimi root]# 

By using XFree86 -configure, I got a working X config. Once that's in place, it
still segfaults....