Comment 7 for bug 659854

I have the same problem, I've fixed it by downgrading just libsmbclient from 2:3.5.4 (Maverick) to 2:3.4.7 (Lucid) on i386 and locking the version in Synaptic. Nothing else needed to be changed.

I could make directories, edit files, etc, but if I copy something only the first 48Kb would copy across and then it'd give the invalid argument error.