Hi Jurgen and Bruce, Well...I have not solutions, I have only read the changes.txt of 2.5.0: "- WebDAV: The long outstanding read-only problem with WinWord and .html is finally solved. Zope sends now an additional ETag header for DTMLMethods and DTMLDocuments. Many thanks to Joachim Schmitz for this hint." I also have similiar problems with Zope 2.5.0 on WIN NT SP6 and 2K pro (more with office 2k than office Xp):(, but Andreas Jung wrote he could not reproduce my problems, so I think generally there aren't problems with 2.5.0. This his Andreas Jung's answer: "This is somewhat strange because I can not reproduce the problem with Office 2K (Win XP) and the latest Zope 2.5 version. I am pretty sure that this behaviour is again caused by the weird WebDAV implementation of M$. Currently I have no further idea what causes that problem." Ciao, Michele P.S. Can anyone explain me the DEFAULTTIMEOUT value in lockitem.py?