Recently I enquired about a web site suffering constant redirects resulting in browser time outs and error messages. Turns out the cause was the Lock/Unlock module.

A page I had created with no knowledge of that module's existence and with pathauto turned creating the path /node/6229 on was published and visible as admin but not anonymously I was told to unlock the page with the module. This caused the redirection problem. The page was published, accessed via a link in a block in a side bar, was not on the front page and was not sticky.

As admin I removed the sidebar link, unpublished the page, switched off the Lock/Unlock via Configuration then deleted the page and the site returned.

Thus the Lock/Unlock module is quite dangerous because it does not send warnings, just trashes the site. Plus it makes it impossible for approved editors to create new pages and have them display because they have no admin privileges. Use with caution. I have not checked but believe this would also impact on the way Workbench operates.

Additional note. I have pathauto switched off permanently now and create paths to new pages by hand. This seems to solve 2 problems. 1 that the Lock/Unlock module doesn't have to contend with /node/nnnn which in this case it couldn't relate to but an actual path and 2 that the past problem of admin screens failing with "insufficient memory" errors no longer happens.

Roger