I have a feeling this may have something to do with CIFS/Samba, for some reason. I recently started seeing this error again but only after I disconnected my laptop from hard-wire ethernet and started using wireless. This matters because in my situation, my computer authenticates Samba access against a central domain controller (i.e. Windows domain authentication) and when I'm on wifi, it can't do it (it's vlan'ed, sort of firewalled out) so I end up having trouble accessing the Samba mount. Meaning I cannot even "cd" into a directory and it will freeze (important: totally different issue than the main topic here). In this particular situation, I didn't VPN back into the network (across Wifi) and do my normal fix. Instead, I just eventually came back (laptop never went to sleep this time) and plugged back in and it started working again (i.e. I could access my files)...

... but this issue still occurred. That is, it was complaining about the "echoln()" function already being defined. So it makes me wonder if there's an error with Samba/cifs itself. I just tried again but couldn't reproduce it, however :-\ Can you?