If you read that old topic, Norngirl posted this about the ATT problem:
Norngirl wrote:
those was easy to fix, since everytime the male's att was corrupetd, i could simply uninstall with the breeduninstaller, install via make a new world and hatch a new pair, and the att's was fixed completely, til next time it breaks ^^
I haven't tried it myself, but might be worth a try?