Game Mechanics: Human Jumping

[Trelaboon]

Okay, so for a while now, ive been playing my Human Monk, and it seems like he slows down in mid air when he jumps. I honestly thought it was just the way the game was now as I also have a Human SK which also sucks at jumping (I got stuck trying to jump over that raster pit for 30 minutes. It wasn't until I recently made a High Elf Paladin that something seemed off. I was able to make these jumps without any trouble. Still I didn't think too much of it...

Fast forward to this evening and I was grouped with a Human Cleric who couldn't make the jump over the pit ladder at Arch Magi in Guk. He had to go through the invis wall every time. I started thinking that maybe there's an error with the jumping on Human characters.

Has anyone else noticed this or am I crazy?