I can confirm the hald <--> smbfs problem on an AMD64-machine in Dapper Drake. I'm currently using cifs as workaround, but there seems to be antother problem: cifs-mounts auto-mounted via fstab don't show up in mtab, but work otherwise as supposed to. This can lead to a bit of a fuzz aka double-mounts when using tools like smb4k or kdf. Btw, smb4k doesn't find any shares in it's AMD64-incarnation in Dapper, while it's counterpart in Breezy works fine.
Sadly, even with the six week delay, Dapper feels quite rushed IMHO.