Anonymisation of user names in the Anti-Kibitzer instead of hiding them. Not seeing any identificator of the author makes it difficult to follow longer exchanges, and I often switch off the AK because of that. So, instead of seeing something like this

• I think that X.
• I disagree with your claim.
• Why do you think so?
• Actually I have changed my opinion.

which may be confusing if you don't know who has posted especially the last reply, it may look like

• User_1: I think that X.
• User_2: I disagree with your claim.
• User_3: Why do you think so?
• User_2: Actually I have changed my opinion.

The AK could simply number all participants in a thread starting from 1 each time the page is reloaded.