Firefox: how do I stop "to display this page"

[pally01]

I'm using Firefox 3.0.11 and keep getting this message when I use the back arrow while browsing: to display this page firefox must send information that will repeat any action
blah blah blah...

I googled for info and there were two suggestions I found that have not worked:
- go into Firefox config and change "browser.sessionstore.postdata from 0 to 1
- disable all add-ons for Firefox to see if one is causing the message.

The message still persists and it forces me to click ok in order to go back a page. Any ideas on what to change to make this go away?

[glc]

There are some sites where you can't get around that.

[pally01]

Well that would explain the lack of success

Not really too big a deal, but still a bit of a pain to keep having to click to get back.

Thanks GLC.