I have an owncloud CardDav account which I sync to KAddressBook.
After creating the account it is synced and works properly for a few hours. After that, I start getting a akonadi_davgroupware_resource crash whenever I try to access contact data (mainly when opening Kaddressbook). Sometimes I cannot see contacts at all, and the addressbook icon is shown as a loading animation instead of the actual icon.

I'm currently compiling kde with debug symbols, so I'll be able to provide more details soon. For now, these are the last 1000 lines from my ~.xsession-errors (note how many requests are made to the owncloud server. Does this look normal?)

http://paste.kde.org/723560/

Reproducible: Always

Steps to Reproduce:
1. Add owncloud account using DAV resource
2. Use for a few hours
3. Open Kaddressbook - every time it is opened, akonadi_davgroupware_resource will crash.
Actual Results:  
Executable: akonadi_davgroupware_resource PID: 10554 Signal: Segmentation fault (11)

Expected Results:  
Not to crash.