If flash is not enabled in the browser going to the above url produces the 'default plugin box'. Cancelling from that, pointing the mouse inside the plugin area and using the scroll button redisplays the default plugin box. As mentioned - its trivial (and arguably correct behaviour as you are interacting with the plugin :)
I'm marking this bug as a duplicate of a request for disabling the popups about plug-ins since that will in essence solve your problem. If that bug gets fixed then once you say "NO" to a plug-in it won't come ask you again, which is really what this bug is about. *** This bug has been marked as a duplicate of 61103 ***
mass duplicate verifications . For filtering purposes, pls use keywd "massdupverification"