On Jul 24, 2013, at 7:21 PM, Graf von Roit zu Hoya <graf.roit@gmail.com> wrote:

there are 2 different errors in your e-mail:

1.) netLoadCalendar ... => unsuccessful "calendar-multiget" REPORT ... looks very interesting because we cannot do anything here - we simply say JavaScript/jQuery to perform the request and waiting for the result ... the interesting part is that jQuery executes the "error" callback, but then it returns 207 (2xx = success) ... you can try to experiment with jQuery (maybe jQuery bug) and report more details about this error (or create a temporary access to your server and send me a private message with credentials)
This error only occurs on one of the nine calendars in this account. It would be possible to create an own account for you on the server, but unfortunately i'm not allowed to gain access to this account and the other calendars, as these contain high secret future appointments and events.

I understand
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 ...