FC5 weird raid issues

[dragoran]

I have tryed to upgrade from FC4 -> FC5 using anaconda but it did not 
detect my FC4 installation which is installed on /dev/md0.
It tryes to add a non raid partition to the array and ignores the raid 
partition. This causes the initalisation of md0 to fail.
Is this a kernel or anaconda bug?
Bug report:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=186312
(no reply ...)
So I backuped my data dan tryed a reinstall and it detected the md0 
array in diskdruid but showed "foreign" as filesystem..
did edit and set mount point to / and filesystem ext3
but it failed formating it with a messages saying that it failed and 
that I should press enter to reboot the system.
What happend? How could such things happen with a *final* release? Raid 
support seems broken and nobody has noticed.
I always updated my system from RH9->FC1->FC2->FC3->FC4 (then 
reinstalled FC4 because of i386->x86_64) but it seems that upgrade is no 
more possible to FC5 :(