While playing yesterday on the unpatched PS3 version I found a kind of break-out from riding a horse. This allows you to fly through entire maps at horse riding speed while ignoring walls (among some other things).

Here's an example skip that can be done with the glitch:

I searched a bit on Youtube but didn't see anything like it, so I presume this is a new glitch? I'll make a more thorough video & explanation about it later. (Have to research it some more first.)

EDIT: a video that explains what the glitch is in more detail. The video description also includes how it's started.

I'm happy to report this game has an infinite jump now.

To round out the glitch tactics, here's another way to go through some walls. But starting this glitch requires a ladder.