Sure, I'll try to get it as soon as I can
I'm sorry, I couldn't figure out how to reply to comments and I thought it was over since they closed the issue so I ended up reposting it.
Oh I see
But one thing I must mention that seems different from the other bugs:
1. It seems to be only farmers doing it
2. They ONLY do this when there are baby villagers around
The frame rate ended up recording in a glitchy way for some reason, so I apologize if it seems really fast and flashy.
https://drive.google.com/file/d/0B-n4rWpi6lepNXk0MjdGLVRkTDQ/view?usp=sharing
It seems to me that only minecarts with hoppers/chests (and probably other minecart types that aren't the usual one) bounce much more than just minecarts. As you watch the video, you can see I tested it with three different carts in several different ways, and a lot of the combinations showed strange behaviors.