We found a number of smart groups based on search builder searches had significantly reduced numbers of contacts on activating the extension. Redoing the search builder searches had the same reduced results. Deactivating the extension fixed the issue.
Sorry that we aren't able to offer any further details, but happy to answer questions or test if desired.
@wildsight Were you able to narrow down the issue at all, figure out what kinds of search were provoking the problem? Did you find a way of getting around the problem without disabling the extension?
We found a number of smart groups based on search builder searches had significantly reduced numbers of contacts on activating the extension. Redoing the search builder searches had the same reduced results. Deactivating the extension fixed the issue.
Sorry that we aren't able to offer any further details, but happy to answer questions or test if desired.
CiviCRM 4.6.24 on Drupal 7.53