There's a thread with a list of suggestions for the next patch that identifies problematic event chains etc. Some of it seems to be sorting out lines of code but I guess others need more testing to ensure they don't cause problems elsewhere - and, as ever, its a matter of time.
For me, the real problem is how the Austrian AI reacts. Whereas France is semi-pushed to war with Prussia over the 1870 events, in truth the Austrians can ignore S-P (& given the French alliance is pretty sensible to do so). But that is the sort of thing that is much more complex to tweak than simply the coding of an event.
AJE The Hero, The Traitor and The Barbarian
PoN Manufacturing Italy; A clear bright sun
RoP The Mightiest Empires Fall
WIA Burning down the Houses; Wars in America; The Tea Wars