Thank you, Enrico, for bringing this issue to my attention via your blog. It explained a problem I had with kaddressbook when trying to get my own calendar server up and running (testing calypso and radicale, and the issue where entries just failed to sync with the server made a real dent in my confidence in kaddressbook and korganizer.
Is there any hope that this issue will be fixed in Jessie? -- Happy hacking Petter Reinholdtsen