I just ran Safari 4.0b for maybe 5 minutes before reverting back to Safari 3x. The new beta seemed to run smoothly, but I loathe the tabs being displayed in the title bar. This is an abomination. It does not fit with Apple UI guidelines and it should be removed immediately. The savings of a few pixels are not worth such poor UI design. This is NOT a case of something new to get used to. It looks like something Microsoft would do--not Apple; and it should be corrected immediately. Please rally behind this, fellow long-time Mac users. This might be the worst idea I've seen come out of Apple since introducing Panther, and it's got to go.