I have a problem with the latest version (1.0.90).

All-day calendar events that are several days long disappear from the feed after the first day.

Example:
An all-day event
Starts on 10th of December
Ends on 22nd of December

This shows up in the feed before the start date and still on 10th of December but disappears after that.
The "Events expire on"-option is set to "Event end".