This version seems to have added an animation on the diff after switching files.
The jumping diff that i'm trying to read in a hurry is annoying enough, but the text also stays blurry for a while afterwards. I don't think there's a way to fix this in WPF; the only fix is not to animate.
Consider also the following scenario: I've made the same change to 30 files. I'm looking over them one at a time to make sure it's the same exact diff for each file. Before: press down a bunch of times, confirm that all is fine. Now: jumping diff; harder to confirm this.
Please, give us an option to turn it off. This product is for professional use. I don't need it to be snazzy; I need it to be maximally efficient.