Trying to create a CDATA section in an HTML document gives this cryptic error message on the JS console: [Exception... "Component returned failure code: 0x80530009 [nsIDOMHTMLDocument.createCDATASection]" nsresult: "0x80530009 ()" location: "JS frame :: :: :: line 0" data: no] The error message should at least include "NOT_SUPPORTED_ERR" (as specified by DOM 2) or "... is not supported". It might be nice if it could say "You can't use createCDATASection in an HTML document, try createTextNode instead", but that might be overkill. The testcase from bug 9741, http://www.people.fas.harvard.edu/~dbaron/dom/test/one-core-html/exceptions, seems to indicate that the correct exception, NOT_SUPPORTED_ERR (9), is being thrown. DOM 2 reference: http://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-D26C0AF8

Nice to have, but not a show stopper.

actually, we seem to not have number-to-string conversion hooked up for any of the DOM errors (eg DOM_SYNTAX_ERR or NOT_SUPPORTED_ERR). Things like NS_ERROR_FAILURE seem to show up in exceptions as a string just fine....

Bug #27403 is probably related to this one. Not sure if one is a dup of the other.

Bugs targeted at mozilla1.0 without the mozilla1.0 keyword moved to mozilla1.0.1 (you can query for this string to delete spam or retrieve the list of bugs I've moved)

Jesse, do you like the error thrown better now? :-)

I now see: [Exception... "Object cannot be created in this context" code: "9" nsresult: "0x80530009 (NS_ERROR_DOM_NOT_SUPPORTED_ERR)" location: "<unknown>"] That's good enough, wfm.