[zottel]

I hope I don't post sth stupid now, as I can't check atm - I don't have a site in mind that opens a tab without any bars and stuff.

I only know: Opera has a nice behaviour when no bars are available: It just shows a tiny yellowish stripe at the top of the window, containing the name of server the window came from. If you click on that stripe - tataa, your bars are back.

Good idea, imho; please bring that to OW if it isn't there already. X-)