53049 2011-01-24 16:32:26 -0800 Wheel scroll is not propagated to overflow: auto elements when on top of position: fixed elements 2018-04-11 07:48:22 -0700 1 1 1 Unclassified WebKit WebCore Misc. 528+ (Nightly build) All All NEW P2 Normal --- 52988 1 mihaip webkit-unassigned gaffne67 hyatt jamesr mitz pkasting oldest_to_newest 339356 0 mihaip 2011-01-24 16:32:26 -0800 To reproduce: Place mouse over the red square (which uses position: fixed) in these pages: 1. http://persistent.info/webkit/test-cases/position-fixed-scrolling/document.html 2. http://persistent.info/webkit/test-cases/position-fixed-scrolling/overflow-auto.html 3. http://persistent.info/webkit/test-cases/position-fixed-scrolling/overflow-auto-document.html and use the wheel to scroll. Expected result: 1. Document scrolls 2. overflow: auto div scrolls 3. overflow: auto div scrolls Actual result: 1. Document scrolls 2. Nothing scrolls 3. Document scrolls It might be easiest to skip over position: fixed elements when determining where to fire/propagate wheel events. Firefox 4.0b9 currently behaves like the actual result (WebKit), IE 8 behaves like the expected result. 339368 1 pkasting 2011-01-24 16:39:26 -0800 Does this have any relationship to bug 47036? 339384 2 mihaip 2011-01-24 17:05:21 -0800 (In reply to comment #1) > Does this have any relationship to bug 47036? I'm not sure, I haven't looked at the code that's involved.