Am 24.07.2013 um 21:25 schrieb Ján Máté <jan.mate@inf-it.com>

I've got an ics-File containing the problematic calendar. It is dumped via wget direct from the davical database. Uncompressed 116k. Not so big as i thought. Would this help? 

I don't think that this can help to debug the issue, because this problem is related to calendar-multiget REPORT (we get raw data from the server without processing the content). Data processing is performed ONLY if this request is successful ...

It's a standard DAViCal with latest patches from you. Postgresql 8.4.13, CentOS 6.4. Nothing unusal...

I understand, but "something" is wrong between your server and CalDavZAP ... and it is very probably the jQuery (library we use). The problem is that your bug looks very specific (browser/version, browser/version + OS/version, browser/version + OS/version + jQuery/version,  ...).

Ok. Tomorrow i try to load the calendar into a test account, but i mean to remember DAViCal's import function is not very reliable.

I give you info on success.