User Agent: Mozilla/5.0 (Windows NT 5.1; rv:10.0.1) Gecko/20100101 Firefox/10.0.1 Build ID: 20120208060813 Steps to reproduce: For certain html code, html comments are displayed in an iframe in designmode when entered via execCommand('inserthtml') but not via write(). Please see attached testcase.

Testcase: The following code is inserted into an iframe in designmode, either via execCommand('inserthtml') or via write(): <!-- THIS IS A COMMENT -->text<br> After the insertion, the iframes show the following contents: Using designmode: "THIS IS A COMMENT text" (wrong); using write(): "text" (correct).

This works for me with Seamonkey trunk on win32 but I can confirm the issue with FF10.0.1 Is this already fixed ? I see something strange with the "IFRAME (write): " field. The "text" appears only if I zoom in/out

Dupe of bug 725069?

In the rich text editor where I noticed this, this was also triggered by pasting content at the end of a line that contains the comment. After pasting via inserthtml, the comment nodeValue is displayed. The original comment node still exists but has been removed from the DOM (i.e. it has no siblings or parent).