During testing Scientific Linux 5.8 Alpha 1 i386 I found some problems:

1. In comps-sl.xml lost group xfs.

2. kmod-cmirror installed with comment:

[root@dhcp-1-129 SL]# LANG=C rpm -ivh kmod-cmirror-0.1.22-3.el5.i686.rpm 
warning: kmod-cmirror-0.1.22-3.el5.i686.rpm: Header V3 DSA signature: NOKEY, key ID 192a7d7d
Preparing...         ########################################### [100%]
   1:kmod-cmirror    ########################################### [100%]
modinfo: could not find module /lib/modules/2.6.18-194.el5/extra/gfs/gfs.ko
FATAL: /lib/modules/2.6.18-194.el5/extra/gfs/gfs.ko: No such file or directory
Warning: Module gfs.ko from kernel  has no modversions, so it cannot be reused for kernel 2.6.18-308.1.1.el5

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Best regards,
Elena