Isn't it weird this happens on every installation,mine and my clients. if it was just one or limited to one host I might think it is the installation. However, today I checked with some friends. We are now up to 926 installations at 8 different hosts and 27 different hosting accounts.
Yes it has been tried on Win7, Vista, XP, Mac, and 4 variations of Linux.
Browsers include MSIE, Firefox, Chrome, and I am sure some of the guys have used or are using other browsers. I have not yet heard back from all of them. No I have not tried using the plugin you mentioned.
I am just going to go back to an older version and recommend the same to my clients.