Further investigation seems to indicate that that actual error is
occuring on line 100 of qx/bom/Label.js :
var inner = 
document.createElementNS("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";,
"label");

According to a bug report from the earlier on this year [1] FF4
disallows creating DOM nodes in the XUL namespace. I am not entirely
sure what this means but is seems to explain why the above code is
breaking. I will continue digging in, but if anyone has insight please
let me know.

-deech

[1] https://bugzilla.mozilla.org/show_bug.cgi?id=546857

On Mon, Mar 28, 2011 at 11:53 AM, aditya siram <[email protected]> wrote:
> Hi all,
> In testing my app with FF4 I am getting an error message similar to
> one mentioned on this list a few days ago [1]. It is a slightly
> different message [2], but maybe it is caused by the same thing.
> Unlike the previous poster I am not loading anything using the
> "file://  ..." url. Has anyone run into this?
>
> The same app works fine in FF3, Chrome and IE 8.
>
> -deech
>
> [1] http://qooxdoo.678.n2.nabble.com/QOOXDO-FF4-tp6206493p6209546.html
> [2] uncaught exception: [Exception... "Component returned failure
> code: 0x80040111 (NS_ERROR_NOT_AVAILABLE)
> [nsIDOMHTMLDocument.createElementNS]" nsresult: "0x80040111
> (NS_ERROR_NOT_AVAILABLE)" location: "JS frame ::
> http://localhost:8080/xnat/scripts/qooxdoo/framework/source/class/qx/bom/Label.js
> :: <TOP_LEVEL> :: line 100" data: no]
>

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