I installed version 6 today on a computer I use as a server for my files. With previous versions I had full access to those files from any other computer. To do so, I had to edit /usr/bin/soffice to comment out the lines that force the lock. That file was again edited after installation, but all LO files are locked to me on any other computer. I use NFS to access the server.
This problem exists across 5 computers, and only showed when I installed LO 6 on most of them.
I think the problem is not with “/usr/bin/soffice” but inherent in the upgraded design. Now any file used is locked by the user and the lock cannot be overridden.