Hello, I have two wikis, with two databases (no prefixes), sharing the *user* and *user_groups* tables using a VIEW. To accomplish this, I created wiki1 as one normally would, nothing special there. When wiki2 came on board, I dropped the tables "user" and "user_groups" for wiki2 and granted a view for those tables into wiki1: mysql> CREATE VIEW wiki2:user_groups AS SELECT * From wiki1:user_groups and mysql> CREATE VIEW wiki2:user AS SELECT * From wiki2:user (Solution borrowed from http://www.mwusers.com/forums/showthread.php?t=2092) Now, this has been working very well for about 6 months in 2 different environments (PROD and DEV). I recently received a report that the "List Users" special page in wiki2 (in PROD, of course) is no longer working, and is throwing an error.: A database query syntax error has occurred. This may indicate a bug in the software. The last attempted database query was: (SQL query hidden) from within function "IndexPager::reallyDoQuery (UsersPager)". MySQL returned error "1221: Incorrect usage of index hints and VIEW (localhost)". The rest of the wiki works just fine. Standard SQL queries on the tables work just fine. The List Users special page loads just fine for wiki1, and there are no other (apparent) problems with wiki2. DEV is ticking along just fine. Same extensions, same code, same versions, same host...aside from content, there is no other difference between these wikis. Another thing to consider is that I am consolidating the wikis shortly, within a couple of months, but I need to explain this, if nothing else. :-) Does anyone have any insight into what could have happened here? Versions: MW - 1.13.1 MySQL - 5.1.30-community PHP 5.2.6 Many thanks!! John