You didn't accidentally kill anyone? Even the friendly thieves in the Verdistis sewers (who are not there with the 1.33 patch)? I have not tested this in a new game, but there was a brief delay when transforming back to human form from a statuette before monsters would register the change of alignment. If you walked up to an orc as a spider, turned human and immediately attacked, you would loose reputation for attacking a 'friendly' creature. There are some monsters that are friendly until you talk to them, or until they see you; if you take them out with a bow at long range you can loose reputation.
Reputation-list-spoiler 
