When a block is going to carry-out the top/bottom margins the floaters in it cannot be positioned properly becaues the top/bottom margin value is applied sometime later by some outer block frame. When this happens the floater needs to be repositioned.

*** Bug 1120 has been marked as a duplicate of this bug. ***

*** Bug 1071 has been marked as a duplicate of this bug. ***

Since 1071 appears fixed (see bug report for comments) and was marked as a duplicate of this bug, I'm going to mark this as verified. Please re-open if there are corner cases that aren't covered by 1071 that you think should be investigated as part of verification of this bug; thanks!

Yes, the case described by 1120, which was also marked as a duplicate of this bug, has not been fixed. Since the page has been changed since the report, I made a version that shows the bug and put the URL above. (http://www.fas.harvard.edu/~dbaron/tests/nglayout/topmarg2.html) I'm reopening the bug.

Thanks a lot, David. [QA Assigning to Jan, since this is CSS.]

Actually this one should go to Christine Dreckman (chrisd). Re-assigning QA.

New test case for this bug: http://www.fas.harvard.edu/~dbaron/tests/nglayout/topmarg3

Finally, we pass this test...Look for it working with tommorows builds.

You're not collapsing margins on floats, and thus the first test in http://www.fas.harvard.edu/~dbaron/tests/nglayout/topmarg3 has too much yellow. I added the last 2 tests - you can see that you're not collapsing from the last test. Reopening bug.

Fixed (again). This time for sure (I hope).

chrisd, could you verify with latest build please? Thanks!

Verified fixed.