Version 4 Public Beta (5528.16, r41176) Steps: Load any page on the web. Actual result: There is no progress bar anymore so user does not know how much a page needs to finish loading. Expected result: The blue progress bar appears in the URL input field, instead of just a spinning loading circle.
Progress bar is a Safari feature, not a WebKit one. Please see <http://webkit.org/blog/101/back-to-basics/>.
He he, I have filed it to Apple as well :)