584254 - HTML document that begins with an XML declaration is treated as an XML

Status: RESOLVED INVALID

(Firefox :: General, defect)

Description

[Da' Nard]

User-Agent:       Mozilla/5.0 (Windows; Windows NT 6.1; WOW64; rv:2.0b3pre) Gecko/20100803 Minefield/4.0b3pre
Build Identifier: Mozilla/5.0 (Windows; Windows NT 6.1; WOW64; rv:2.0b3pre) Gecko/20100803 Minefield/4.0b3pre

Minefield produces the following error 
"XML Parsing Error: XML or text declaration not at start of entity
Location: http://www.teavana.com/The-Teas/Oolong-Teas/Monkey-Picked-Oolong-Tea.axd
Line Number 2, Column 1:<?xml version="1.0" encoding="utf-8" ?>"

IE ignores the XML declaration and renders the webpage.

Reproducible: Always

Comment 1

[Matthias Versen [:Matti]]

That is not a html document because the server sends :
Content-Type:	application/xhtml+xml; charset=utf-8
(checked the URL with http://web-sniffer.net )

You should open a bug for IE.

Comment 2

[Da' Nard]

Various Mozilla browsers (including the latest release of Firefox) render that page correctly, see http://browsershots.org/http://www.teavana.com/The-Teas/Oolong-Teas/Monkey-Picked-Oolong-Tea.axd
This change is not announced as one of the changes in version 4.

Comment 3

[Matthias Versen [:Matti]]

Seamonkey1.1x shows the same error according to the browsershots page while Firefox3.6.8 seems to render it.

You are doing very stupid User Agent sniffing somewhere !
I get a XML error with 
Mozilla/5.0 (Windows; Windows NT 6.1; rv:2.0b3pre) Gecko/20100803 SeaMonkey/2.1a3pre 
but as soon as I append a Firefox/3.6 it works 
Mozilla/5.0 (Windows; Windows NT 6.1; rv:2.0b3pre) Gecko/20100803 SeaMonkey/2.1a3pre Firefox/3.6
just adding Firefox isn't enough and you have to clear the cache or do a forced reload if you want to reproduce it.

I get the opposite result if I use 
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8 (works)
and only change the UA to:
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.8) Gecko/20100722 Seamonkey/1.0 (doesn't work)

Your User Agent sniffing is wrong, see http://geckoisgecko.info/ and it fails with your build because the UA in your nightly build contains Minefield instead of Firefox.

Comment 4

[Da' Nard]

Not my page, but interesting. Definitely is not a Firefox problem then. Their sniffing does fail.

Comment 5

[Matthias Versen [:Matti]]

Oh sorry, I thought that this is your page.
You can see the bad sniffing if you look at the browsershots page.

All the Minefield, Iceweasel,K-Melon and Seamonkey shots show the XML error but they are all using Gecko. There should not be a Rendering difference between the same Gecko Versions in different browsers