First bug you probably will not be able to do anything about. I remember it from vanilla, but I have not seen it since. It has to do with phantom units on the battle-map; a unit will think is in engaged with an enemy unit that is not there.
In player controlled units this usually means a couple of solders in that unit will be stuck in that spot and the rest of the unit will function, but sub-par as it will continue to think it is engaged and so will not do things like charge.
In computer controlled units the unit will simply run back and forth over the same spot, unable to get over the idea that something is there to fight.
This bug will affect a random spot on the map, and any unit passing over that spot will be affected.
The second bug involves upgrading non-upgradable units.
I have been playing Adunabar and have a great deal more income than I know what to do with, so I have started upgrading my garrison units which consist of Orc-bands and Snagas. Expecting to see only a silver shield, as orc weapons "can not be upgraded", I have found that every so often, maybe one in five or more, will get not only a silver shield, but a gold sword as well. Yowza!
Far be it from me to complain about my gold sworded Snagas, but it did cross my mind that this might not be intended.
I will add more non-CTD bugs to this thread if I come across them.