I am one of those strange people that wants the editor in the signature box in the edit account pages :)
After getting everything set up and running (easily, though it took a little bit of looking to find where everything was as it wasn't where I was used to it being, so nice work on that front ;) everything seemed to just work and I am reasonably certain I had the editor in the signature field to begin with. Then I went and attempted to get IMCE happening and it stopped appearing (assuming it was ever there to begin with and I'm not just remembering incorrectly).
Complete uninstall of both modules and reinstall of WYSIWYG API with TinyMCE did nothing. I thought to try the dev version (was using the stable 6-0.5 previously), which also hasn't helped. I used some code from my D5 template.php which is how I got it to show up in there in the days before WYSIWYG API, no go.
So is there anything specific I need to do to get the editor to stick into the signature field or is there just something ridiculously obvious that I've managed to overlook?
Using Drupal 6.9 and looking with FF3.0.5 and Safari 3.2.1 if that helps.