A few months back, I wrote about my trials and tribulations with Samba in KDE + Feisty, but, now that I had a fresh install of Gutsy to play with, I tested the sharing applet once again. Once again, however, it failed out of the box, although I must say that it was not as fucking bad as the last time.
In the KDE sharing applet, I added the folder name and set it to be writeable. I restarted Samba (which hadn't been done :S) and tried to access the share. However, while I could see the share listed, navigating into it came up with a message The file or folder smb://blah/blah does not exist. Not too promising.
Google, as always, was my friend. I was told that this issue was being caused by the line msdfs proxy = no. Commenting this out in /etc/samba/smb.conf and restarting the Samba service did the trick.
Also, the smb.conf issues in my earlier thread seem to have been cleaned up in whichever version of KDE (3.5.8?) that Gutsy is using. Praise the Lawd!
Hope this helps.