I have been getting:

---------------------- Start Rootkit Hunter Scan ---------------------- 
Warning: Checking for prerequisites [ Warning ] All file hash checks 
will be skipped because: This system uses prelinking, but the hash 
function command does not look like SHA1 or MD5. Warning: The file 
'/usr/bin/ipcs' exists on the system, but it is not present in the 
'rkhunter.dat' file. ----------------------- End Rootkit Hunter Scan 
-----------------------

from rkhunter since the upgrade from 1.4.2-3 to 1.4.4-1. I reverted to 
1.4.2-3 (still available at 
https://koji.fedoraproject.org/koji/buildinfo?buildID=521563).

Does anyone have a better solution than reverting?

Cheers,
Dave

-- 
"They that can give up essential liberty to obtain a little temporary safety deserve neither safety nor liberty."

-- Benjamin Franklin