Command-clicking a form's submit button behaves like a normal click and submits in the same frame instead of submitting in a new tab or window. To see this, open the URL and command-click the Submit button. See also bug 11628.
See bug 3638 for a case where the expected behavior is for the modifier state to be ignored!
I think I'll be able to fix this without re-breaking bug 3638.
Just need to pass the correct underlying event in EventTargetNode::dispatchMouseEvent, which fixes this without breaking bug 3638. I still need layout tests for both bugs, and I really want to copy this one into Radar, but otherwise ready to go.
<rdar://problem/4889565> REGRESSION (r17597): Command-clicking a submit button does not submit in a new tab/window
Committed revision 18293.
<rdar://problem/4860067> REGRESSION: Command-return no longer opens submitted form in new window (11858)