Hi snufkin,
there seems to be a problem when KO/Pi is loading a particular appointment, which is not loaded correctly.
The easiest way would be, that you send me your ics file such that I can debug this.
If you do not want to send your private data, you could remove half of the events in the ics file.
If loading is then correctly, the particular appointment was in the other half.
You could then proceed with the other half, until you found the particular appointment.
Then you could send this appointment to me such that I am able to debug this ugly bug.
I guess, it is an appointment with a recurrence ...
z.