Jumping skill on waterfalls is still abuseable. i read it was fixed some time ago. right now you can stay in a waterfall, if you just face the left or the right side of a waterfall and move forward it adds uses to the skill in no time. got it on 100 since a long time but i was just curious after i read its fixed. its not.

not sure if that counts as a bug because autorun (R-key) is part of the game, but if i would just equip a cart and swim with R in a area where the water is deeper than 16.0m it will add actions to swimming skill. same for running but swimming is the only action skill which is really hard to raise, so maybe its abuseable this way.