[Webkit-unassigned] [Bug 10267] New: Can't scroll page downwards with scroll wheel, when pointer is on top of non-scrolling iframe

[bugzilla-daemon at opendarwin.org]

http://bugzilla.opendarwin.org/show_bug.cgi?id=10267

           Summary: Can't scroll page downwards with scroll wheel, when
                    pointer is on top of non-scrolling iframe
           Product: WebKit
           Version: 420+ (nightly)
          Platform: Macintosh
               URL: http://www.screwedbydesign.com/blog/2006/08/firefox_2_vi
                    sual_refresh_progress.php
        OS/Version: Mac OS X 10.4
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Frames
        AssignedTo: webkit-unassigned at opendarwin.org
        ReportedBy: jonathanjohnsson at gmail.com


In the reported page, try scrolling the page with the mouse scroll wheel, when
the mouse pointer is on top of the google ad just above the comments section.
You can only scroll up, not down. (The ads may change, it's the two column,
text only ads that seem to have this behaviour.)

I reduced the problem, and it shows that if the iframe has scrolling="no" set,
and the iframe height is smaller than its enclosed source, you can't scroll
downward as described above (scrolling sideways works).

Both Firefox 1.5 and Opera 9 will scroll in any direction, while both latest
Safari and latest WebKit won't scroll downwards.

Reduction follows.


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