Calendar Events with a description or summary with multiple lines are ignored on syncing.
With DAVdroid 0.6.8 everything works fine.
Steps to reproduce:
Create an event with 64 or more characters in description or 68 or more chars in summary,
after syncing to the mobile device the event is missing.
An event with less then 64 chars in description and less then 68 chars in summary works well.
The first following event is displayed correct after syncinc, the second is missing
SUMMARY:Test with 63 characters
SUMMARY:Test with 64 characters
DAVdroid 0.6.10 from F-Droid (no error in 0.6.8)
Google Nexus 5 running Android 4.4.4 (cm-11-20141008-SNAPSHOT-M11)
OwnCloud 7 (hosted on virtual server)