Scrolling to top raises an assertion error
This happens in buffers when there is no extra backlog to retrieve anymore.
In qtguimessageprocess.cpp, "messageProcessor()->process(msglist);" is called with msglist being an empty list. This seems to raise an assertion when taking the first element from the _currentBatch list in the ProcessNextMessage function.
I included a small patch which checks the size of msglist before pushing it in the _processQueue.
That aside, the quassel project looks awesome :)