Ezio: but you would have a green bar "You are logged out - clear this message", right? And if you follow the "clear this message" link, you get to a URL with no action, right? So I doubt this is what Terry did.

Terry: can you reproduce this (I can't)? If so, please give exact reproduction steps. How exactly did you go to bugs.python.org?

I can reproduce it for the search case. In that case, stripping the action is not a good idea.

I think the __came_from field should include query parameters.