This is my experience and feel after testing 1.5.6maemo5.1

Tested against a win7 box one default admin share and one user created share both with username and password.

See the screenshot.



The topmost Samba mapping is created using a profile then mount IP + D$ it worked at once but initially browsing took its time, slow, felt like some sort of indexing/caching was done, hung for a while. After that browsing was ok.

The other mapping is a Samba Quick Mount using a standard user created share.

Copy files both ways no problem.

Umount unmounted both shares with no warning.