A bit of a different first post, but whatever. I did a quick search, but didn't seem to find any mentions of this bug, so it's either very recent one, or just undiscussed. I've noticed that if you use Lini's Animal trick on a strength or a Dexterity check of any kind, use shapeshift, but cancel out the discarding, the result is your animal trick die and bonuses staying despite being able to use both abilities again. The end result is that you can stack up a big wad of d4s as long as you can use both animal trick and shapeshift. This has occured in both quest mode and story mode so far, and is consistent. While amusing, it is still a big bug that probably should be fixed .
Edit:
Did a little tinkering with this bug to see how absurd it can get, and it seems the maximum number of d4s you can roll is 27. Combined with the static increase from animal trick damage, you can get some truly large damage numbers. Makes one wonder if Harsk and Lem have the same effect if cancelling out discard/recharge effects...