We did an upgrade from 5.0.9 to 6.0.4. It went off without a hitch or any errors. Once users started getting back in they complained of share issues. After investigating I came up with any user who tried to look at a document or download would get a 404 file not found error. I found that when the user opens something in the top level it would ask them for their credentials. They enter them open the file. Then they go back to the files the got the error on and they could open them.
I tried the fix in: [SOLVED] Shared Briefcase problems post 5.0.18->6.0.1 upgrade but it did not fix the issue. Any help would be appreciated!