Last modified: 2006-05-21 09:14:59 UTC
http://en.wikipedia.org/w/index.php? title=Stem_cell&action=edit says "You are editing a prior version of this page. If you save it, any changes made since this version will be removed." But clicking Save without making changes results in no change to the article. This error happens whether or not I'm logged in, and it still happens after making real changes to the article. It does not happen with other articles.
That's damn odd. Investigating...
There was a database inconsistency, with two of the slave databases recording an older current revision number for this page. The incorrect version was used for the comparison used to trigger the message. The inconsistency may date to an April 15 database server crash. I've corrected the database entries manually for this page, but it would be wise to check for other problems.