Every few weeks, the wiki server appears to lose the permissions set up under settings for each particular wiki, for all users except admin. This translates into all private wikis being invisible to the users. The following operation appears to fix it, but the problem then eventually re-appears. log into /groups as admin select wiki go to settings make wiki public, and save make wiki private, and save restart webserver from server admin app. I took a look at the config files. When the problem appears, none of the files are corrupt, and all permissions appear to be correct. Note that when executing steps 1-5, some of the wikis re-appear, and some don't until the webserver is restarted. Has anyone experienced this? Any suggestions on how to fix this?