dean.edwards.name/moz-behaviors/caveats/

Caveats
  1. there is a bug in Mozilla that prevents binding to the following table elements; <thead/>, <tbody/>, <tfoot/>, <tr/>, <td/> and <th/>. i.e. all of them! There is a solution to this included in the downloadable example.
  2. <public:event/> is not yet implemented
  3. <public:defaults/> is not implemented
  4. I haven’t implemented behaviorUrns for Mozilla. Not sure what what they are made of in Explorer...