In the battle against the final boss, there is a glitch that seems to have hit quite a few people.
I was enjoying hearing him ramble for about 3 minutes, then realised the game had a bug.
I tried a few times to trigger the shooting mechanism but nothing seemed to work.
On the odd occasion when he would shoot a bomb out, it'd either hit the over-zealous shield or drop right onto me (if I was below him).
So, the only solution I could find was to create a new game and continue from the start of Chapter 9.
It doesn't take long to get to the final boss if you know what you're doing.
Great game, that was the only major glitch I ran into after patch 2 was applied. Everything else worked wonderfully, great work Steam!