When the Web Inspector is docked and focused, and a Backspace keypress is not handled, it gets routed into the inspected page thereby causing a navigation to the previous history URL.
Created attachment 89779 [details]
[PATCH] Suggested fix
Committed r83968: <http://trac.webkit.org/changeset/83968>
This patch breaks console in chromium on linux.
Backspace doesn't work in console.
This is not the right approach to fixing the user-visible issue.