<rdar://problem/9225768>

(In reply to comment #0) > Created an attachment (id=87967) [details] > Test case > > The attached test case shows that the rendering of the mfenced element is not updated when its open, close and separators attributes are changed. The attached test case does not seem to agree with the comments, as it does not change the the values of the second mfenced element. Do you mean something like the following: <p> <math xmlns="http://www.w3.org/1998/Math/MathML"> <mfenced id="fenced" open=")" close="(" separators=","><mi>x</mi><mi>y</mi><mi>z</mi></mfenced> </math> </p>

(In reply to comment #2) > (In reply to comment #0) > > Created an attachment (id=87967) [details] [details] > > Test case > > > > The attached test case shows that the rendering of the mfenced element is not updated when its open, close and separators attributes are changed. > > The attached test case does not seem to agree with the comments, as it does not change the the values of the second mfenced element. The Web Inspector shows me that the values do change. I wonder why you are seeing different results.

(In reply to comment #3) > (In reply to comment #2) > > (In reply to comment #0) > > > Created an attachment (id=87967) [details] [details] [details] > > > Test case > > > > > > The attached test case shows that the rendering of the mfenced element is not updated when its open, close and separators attributes are changed. > > > > The attached test case does not seem to agree with the comments, as it does not change the the values of the second mfenced element. > > The Web Inspector shows me that the values do change. I wonder why you are seeing different results. Because the change is not user-visible if the open tag is changed from '(' to '(', and the two lines are always identical. Thought the original intention of the test case was for the change to be user-visible. Wrong assumption?

(In reply to comment #4) > (In reply to comment #3) > > (In reply to comment #2) > > > (In reply to comment #0) > > > > Created an attachment (id=87967) [details] [details] [details] [details] > > > > Test case > > > > > > > > The attached test case shows that the rendering of the mfenced element is not updated when its open, close and separators attributes are changed. > > > > > > The attached test case does not seem to agree with the comments, as it does not change the the values of the second mfenced element. > > > > The Web Inspector shows me that the values do change. I wonder why you are seeing different results. > > Because the change is not user-visible if the open tag is changed from '(' to '(', and the two lines are always identical. Thought the original intention of the test case was for the change to be user-visible. Wrong assumption? The open attribute’s initial value is "[", and the test changes it to "(". My understanding is that the change should be visible, and that along with changing the close attribute to ")" and the separators attribute to "," should make the second line identical to the first one. Their DOM trees are identical, other than the id attribute.

> The open attribute’s initial value is "[", and the test changes it to "(". My understanding is that the change should be visible, and that along with changing the close attribute to ")" and the separators attribute to "," should make the second line identical to the first one. Their DOM trees are identical, other than the id attribute. You are right. I made the wrong observations as I downloaded the test case from the preview page where the attributes were already altered. My apologies.

Created attachment 225230 [details] Reftests The test case seems to pass for me. However, I attach some reftests from a patch of bug 124838 that fail.

Created attachment 285222 [details] Another test case To avoid confusion, I'm attaching a new test case that still does not work in WebKit.