Even without a patch, it's hilarious.
What a funny bug... Want to outrun Gunnar with Kreg?
Only in HotA and only if you're a real hardcore player!
It's impossible to repeat, and the bug resets if, after loading the save, you enter the Watering Place with a new hero. As a result, it gave +1000 movement points to the heroes permanently.
Red password: theprid
Blue password: 3
The same thing happened to me in one of the games in the series with Reddi (although, because of this, I overextended and lost, surrendering on day 117:D). After the game with Reddi, I loaded the game as myself, and the bug disappeared. Indeed, this happens in a rather tricky situation after loading a save and then entering the "Watering Place."