Upstream changed the default behavior of Backspace on Linux builds in Firefox 2.0 betas.
You can change it back by opening about:config and changing browser.backspace_action to 0. -- The backspace key pages up instead of going back in history https://launchpad.net/bugs/60995 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
