1) ks to a wrong tree (arch substitution is the simple solution here) 2) you get the "That tree doesn't match your boot media" error Anaconda now refuses to mount any NFS dir, no matter if it's correct/invalid/etc. Version-Release number of selected component (if applicable): FC6-re20061011.1
I was never able to reproduce this 100% of the time, even though I did see it and know it was happening. Are you still seeing this?
Easily reproduced with RHEL5-20061127.nightly.
*** Bug 211987 has been marked as a duplicate of this bug. ***
Now that I've removed all the old mount code, it's unlikely this problem exists anymore.