Domino 8.5.1 HTTP/URL errors

Hope somebody has an idea how to solve this problem. It is a bit odd. Installed Quickr 8.2 with latest patch on a Winodws 2003 Enterprise server. Installed according to the books and worked fine until yesterday.When you now try to change folder option, file permissions etc. the page loads, you can make your changes just fine. But when you submit the changes, you see e. g. the message ‘Putting away the folder’ and the next page is a ‘Http Status Code: 404, Reason: File not found or unable to read file’.

The strange thing is the URL is missing a part:

http://www.myserver.com/h_Toc/D0A58CFF88E9100B852572C300517498/?OpenDocument&Form=h_PageUI.

As you can see, between the …com/ and the h_toc … there is the complete Lotusquicker/workplace/ part missing.

Any ideas?