rdar://problem/4823079 See https://bugs.webkit.org/show_bug.cgi?id=10313 for test cases and an extended discussion. Fixing this bug appears to be blocked on disentangling the loader from Frame.
*** Bug 10313 has been marked as a duplicate of this bug. ***
Via Bug 10313 Comment #85: > Here is the google chrome bug that is linked to this issue: > http://code.google.com/p/chromium/issues/detail?id=8441