It seems that there is no way to mount shares whose names contain characters that need to be quoted by the shell. smbmount "//smbserver/sharename with funny chars(likethis)" mountpoint you get an error from the shell pointing out that it doesn't like the invalid characters when it passes the arguments to smbmnt. Double escaping those characters also doesn't work, as smbmount give you an error if you use something like smbmount "//server/share\ name".
should be fixed in samba-2.0.6-1, in the next Raw Hide release.should be fixed in samba-2.0.6-1, in the next Raw Hide release.