I had problems upgrading Horde on UCS 4.3-1. In the forum I found hints that de-install and install should work. So I tried it.
After several tries it the de-install went through (but only from the command-line afaik). I was also able to install again. But now all appointments in the calendar are shiftet by 2 hours.
From a backup I was able to recover the old configuration of Horde to compare with the current configuration. Horde was configured to store events in UTC before. That changed apparently.
Any help to analyze this appreciated.