After Lion can't access NTFS shared folders any more After upgrading to Lion, my NTFS shared folders are no longer accessible. I can see the shared folder, but when I try to enter from Windows 7 box it says Windows cannot access \path\to\usbsharedresource.

Even BOOTCAMP partition which was shared and working now inaccessible... 

SMB is ON.
Upgrading to Lion breaks SMB.  Something to do with UUIDs or GUIDs I think.

Create a new user on the system, give that new user access privileges through the SMB share, and connect to the share using the new user name/password.  Accounts that existed pre-Lion upgrade won't work due to this UUID problem.