When you navigate with the Back and Forward buttons, Opera doesn't fire
This page flashes an alert when the
unload events take
place. Do the test by going to this page and returning here by the Back button.
The unload alert of this page always flashes: you click on a link. When you return, however, the load alert doesn't flash: the event is not detected.
Once you have returned here, go forward to the other page again. The load alert doesn't flash.