Created attachment 8740644 [details] standards-mode.html New enhanced test for bug 756984 implemented in bug 1263909 fails in Standards Mode. While writing the test I noticed that it fails in non-quirks mode, that is standards mode. I had to remove <!DOCTYPE HTML> to run the test in quirks mode. The problem is this: In a contenteditable using up or down arrow leaves the selection in the surrounding DIV and not in a text node when moving from the end of a longer preceding/following line. This can be seen in the attached example. The example works in Chrome.
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