Hello.
I suffer from this problem for several months and now am frustrated upto write here...

My kaddressbook works fine after start. But after 3-5 hours of inactivity the right window showing the contact details freezes on the last contact! The search panel works fine and allows me to find the desired contact, it appears in the left window (list of suitable to the search contacts), but the right window of details does not react.

Double click on the contact causes the full "Edit contact" dialogue to appear, but it appears empty.

The only way out of this which I know is to restart kaddressbook.

Any hints will be appreciated.
Many thanks ahead.