Ah ok, then this is the problem:
http://fedoraproject.org/wiki/Common_F16_bugs#Bash_entry_in_.2Fetc.2Fshells_disappears_after_update
Ah ok, then this is the problem:
http:// fedoraproject. org/wiki/ Common_ F16_bugs# Bash_entry_ in_.2Fetc. 2Fshells_ disappears_ after_update