[Fatt_Shade]

It`s easy to check, but i try it in mod and in original game and similar thing happen. Start game on any mod and go to marshan swamp, accept quest from with to blow up alchemist cauldron but before do it save game and use stinky elixir (right click on item in inventory and use it) it always give 150+ exp points for mage up to 200 so it 100% to get you from 1st lvl p to 2nd then. See choices offered and then load and go to greenwort and use elixir, then try it in arlania/verlon forest/lyaro island.
I know about class lds gain on lvlup but i sometime get lds like 174, or 231 and that`s got nothing to do with 40/50/60 multiplier for each class, and i have same numbers in my hero.txt file like in original game settings so i dont think it`s about that. And rune gain is also same as original.

EDIT : Damn, you`re right. Try basic game with no mod changes and got same lvlup choice every time. But still have no idea what file make this differences on hero lvlup.