http://www.quirksmode.org/bugreports/archives/safari/index.html "When you define visibility: hidden on * Explorer Windows and Safari don't show anything ever again. Test page. http://www.neurone.it/lookAtMe.html Workaround not included. Reported by Giuseppe Bertone."
Nice testcase, stupid bug, changing component.
*** This bug has been marked as a duplicate of 4377 ***