Version 2.2.0.5 changes.
Critical update to mitigate potentially serious issue – Please read this. 
We recently discovered an issue with Timelapse versions released from April onwards (numbered version 2.2.0.0 – 2.2.0.4). While it may not affect all users, you should update Timelapse now. The issue occurs when Timelapse loads an image set for the first time. Instead of reading all images, it may occasionally skip an image, where it instead creates a duplicate of a nearby image. 
Important! To check if any of your recently loaded data sets were affected, as well as how to fix them, read http://saul.cpsc.ucalgary.ca/timelapse/pmwiki.php?n=Main.Messages 
Changes in earlier versions: 
Visit the version history at: http://saul.cpsc.ucalgary.ca/timelapse/pmwiki.php?n=Main.TimelapseVersions