Just upgraded my Ubuntu Server to 13.04, and the existing and working fstab configuration for a cifs mount is failing with the generic -22 error (invalid argument):

12:38 PM wesley at wsrv cwd ~

$ sudo mount /Volumes/Storage/

mount error(22): Invalid argument

Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)

This is the line at /etc/fstab:

//10.0.0.1/Storage      /Volumes/Storage        cifs    uid=1000,gid=1000,user=wesley,password=[hidden]       0       0

The server is an Airport Extreme, other machines connect to it fine currently.

This was working fine on 12.10.