I've been playing a Norn Guardian and i have found 2 jumping puzzles so far!
1) The first one was in Wayferer Foothills, Shamans Rookery cave. There were a few thin walkways with Ravens on them, The ravens knock you back so you had to wait for them to fly away or jump over them. Then you would get about 1/4 way and there would be a Shaman boss to kill. Took me and a random Necromancer about 2 hours to get to the end. Then we were greeted by 2 of the bosses! Yeh we got owned, Recruited a few other people then waited for them to master the puzzle and then finally killed them.
A chest was the reward, with a crappy chest plate! haha was really fun though.
2) The second one was today. In the Diessa plateau, Next to the Blaster Moors. It was like a half destroyed watch tower with trebuchet and undead people on it. About 4 of us took on the challenge of climbing up it. There would be a rock or log sticking out of the building a little bit some to trick you. Took us about 30 mins to figure it out but we got there. At the top there was a level 19 Veteran and nothing else hah. Again very fun though!
So, Have you found any?