Posted this to the Plone Mailing-list, but this is more of a problem I am having with Zope. There will be additional information here - http://www.nabble.com/Indexing-Bug---Index-changes-and-is-not-always-correct... Basically the problem I am having is that I create an index, but sometimes this index changes and is incorrect. To test this I would constantly click the 'Clear and Rebuild' button under the Advanced Tab. Then I would browse my index under the Indexes tab. After repeating this many many times, I would get 2 different results for my index (1 correct, the other completely wrong). I didn't change anything else, I just kept clicking rebuild. I noticed something interesting in my debugging window. All rebuilds that resulted in a correct index had this - DEBUG txn.-1223402608 commit <Connection at 0b5a01ec> All rebuilds that resulted in an incorrect index had this - DEBUG txn.-1244382320 commit <Connection at 0965020c> Something different is being done, I'm just not sure what or why. Any suggestions as to why this is happening or where I should look to fix this would be greatly appreciated.