In this changelog
http://pubsvn.ez.no/websvn2/comp.php?repname=nextgen&path=%2F&compare[]=%2F@24274&compare[]=%2F@24275
the content of the function storeobjectattribute is removed (and moved some where else) which breaks webdav functionality
Steps to reproduce
Upload new image with webdav - the image seems to upload but the image is not uploadet, the object is created.