Well I just closed it and tried it again, and it appeared to be working, for a few presses of "Load more". But then strangely it sort of wrapped the tweets around in a circle, so that even when scrolling down it was actually going to the more recent messages, which I'd just passed as well and then it crashed (this is with 2.7.3 and the Qt hotfixes installed; I am running PR1.3).

I'm quite puzzled by it, as it's really unusable for me in its present state, but otherwise a very good looking application.

Thanks for your help.