Yes, i did exactly this. I only wrote the whole path in the email just to get sure, we talk about the same dirs. My fault, sorry.
should be:cd /usr/share/davical/htdocs/caldavzapvi config.js./cache_update.sh (executed from the CalDavZAP directory!)
I did this and i cleared the local cache from firefox as the offline cache too. But nothing changed.Another possible problem is, that you may have some apache cache enabled (I also use it) ... in this case you need to do a:"/etc/init.d/apache2 reload" (otherwise your apache will return the internally cached /old/ version of files).