I have just upgraded from 9.1.0 to 9.1.1 using Owncloud’s Debian 7 repository. Everything went smoothly. However, the calendar app no longer shows calendar entries. I instead see a blank calendar and spinners appear under “New Calendar” and “New Subscription”. Subsequently, the task app is just a blank white page with the Owncloud header on top. This happens with the latest Pale Moon 26.4.1, but not with Firefox 45.4.0, both on Linux.