If I just upgrade the MongoDB version from 2.4 to 2.6, but don't upgrade the authentication model to 2.6, "show users" command fails:
> show users 2014-03-12T12:13:39.480+1100 Error: The usersInfo and rolesInfo commands require auth data to have schema version 3 or 2 but found 1 at src/mongo/shell/db.js:1274
Is this expected? Should "show users" command work for both 2.4 and 2.6 authentication models?