Safari asks a question when I return to the previous page
I've used a mac for over 10 years now, and I have come across something new and unusual. While using Safari and my trackpad to roam the internet I often return to the previous page when reading news itetms to open another news story. However, sometimes when I scroll or "gesture" to the previous page, I get this message from Safari:
"Are you sure you want to send a form again?
To reoopen this page Safari must resend a form. This might result in duplicate purchases, comments, or other actions"
It seems to happen most frequently when I'm on the MacDailyNews website--a site where I don't purchase, comment, or do other actions. LOL
Any idea why I'm getting this message? I simply click CANCEL and I am taken to the appropriate page so there's no harm done, but this does get a little annoying and I'd like to resolve the issue if possible.
Thanks for any input you may offer!
2.66 GHz Intel Core 2 Duo iMac, Mac OS X (10.7), 1 Tb of storage