この辺のイベントが楽しそう。

IE
layoutcomplete outofsync propertychange readystatechange repeat resize
resume resync reverse rowenter rowsdelete scriptcommand scriptletevent
seek syncrestored selectionchange selectstart trackchange unload
visibilitychange

FF
beforeunload broadcast DOMAttrModified DOMAutoComplete DOMPopupBlocked
ls-load ls-progress PluginNotFound pageshow overflow overflowchanged
popuphidden popuphiding popupshowing popupshown PopupWindow reset resize
underflow unload windowZLevel xforms-moz-hint-off

safari
readystatechange resize search textInput zoom khtmlHorizontalmousewheel

ブルートフォースでイベント登録しまくっていろいろ操作しながら試せば変なイベントとか取れる？