When playing as a gnome/halfling, if you have a full inventory before you convert a glyph (and have none of the relevant potions to stack with) the potion is not created. Shouldn't the potion spawn attempt happen after removing the converted item?
Taken literally, the rogue's DANGEROUS trait "Earn -5 health per level" means their total health would drop by five every level, rather than having a smaller "hit die" than default. "Earn only 5 health per level" makes more sense.
puzzle levels purge the backpack, which doesn't really make much sense, as the puzzle levels are a separate entity to the main dungeons.