Loss of Kontact Kalendar module after update

Hi, I used apt-get dist-upgrade last night, as I usually do when package updates become available on R14. After the latest update, I started Kontact: KMail works fine, as usual. But when I clicked on Kalendar, I got a "Kontact Error: Impossible to load the calendar module; can't open the module". I went to Configure Kalendar and got a message saying something like : "Could not find the specified korganizer library. Diagnostic is : can't open the module. Possible reasons: *An error occured during your latest TDE update, leaving an orphan configuration module. *You have a third party module somewhere." (as far as I know, I don't). I use Ubuntu Precise with TDE-R14 nightly builds on a 64-bit system. I need to get my Korganizer working again: I am fully dependent on it for all my appointments. Any suggestions? I checked this trinity discussion site several times to see if anyone else had the same problem: seems not so. Thanks in advance, Marco