Persistency problem with Pier 1.1.1 on Mac OS X Server

Hello, I have a Pier 1.1.1 installation running on our Mac OS X Server. While the Pier system runs just fine, I noticed that the system stopped saving the changes persistently to the image. After playing around a bit with our installation, I was able to reproduce the problem: - I start with a clean Pier image (and import content from a previous 1.1.1 installation using the Importer/Exporter component) - I choose PRImagePersistency (duration: 30 minutes; maxImages: 3) as the persistency scheme - I start changing the wiki - The first two saves work perfectly: Pier creates two new images + changes files - When the third backup should be made, I get an error: pier.image not found - I also tried to manually save the image, but get a similar error: Squeak cannot locate the changes file /...../pier.changes. - I checked: both files are where they should be Kind regards, Andy