actually you are evaluating two different engines based on one single feature that does not exist in any of the situations... how can you then speculate that one is superior just because Johnny told you it was possible here, and the guys at IPB told you the opposite?.... i suppose IPB guys just did not evaluate the application, and gave you a quick answer.

Johnny is right, it can be done. not with the actual engine, you would require a product to be coded to execute this, but basically, it's done already, as some of the guys here already coded something similar, but have a button to check existing thread titles instead of having a ajax popup.

what you require is the point that will make you choose a forum script instead of another?!... seriously? all the other features are not good in the balance?