Can't parse URL on cifs/smb share - gnc 2.3.12

[Adam Rosi-Kessel]

My gnucash file is kept on a network samba share, mounted locally in 
Ubuntu 10 via cifs.

The file works fine stored locally; but when loaded from the share 
(whether symlinked into home directory or just opened under the location 
under /mnt) I get the error "can't parse URL on file://(path)."

Why would a file on an smb/cifs share not open in gnucash?

Permissions are all okay for the user on the relevant file and directory.