GGE won't allow preview of minimsg.xml

[GoogleCodeExporter]

Description of the bug/feature, or alias/deletion request. (For aliases use
the form old_url => new_url. For deletions, just list the URLs.)
==================================
Using the legacy GGE located here:
http://code.google.com/apis/gadgets/docs/legacy/gs.html
if I try and load "MiniMessage" then preview it I get this response.
"Preview is not allowed for this file"
I am not making ANY changes once loading the file. It is the default
MiniMessage. I also notice if I try and load the xml via the link:
http://doc.examples.googlepages.com/minimsg.xml instead of FireFox
rendering it instead it trys to download the file. While below I refer to
MiniMessage the same exact thing happens also for:
drag.xml API example.
Since both of these issues are related imo I will combine them here.

PLEASE FILL OUT THE FOLLOWING FOR A BUG REPORT ONLY (delete everything
below this line for a feature, alias, or deletion request):

What steps will reproduce the problem?
======================================
1. Use GGE located here:
http://code.google.com/apis/gadgets/docs/legacy/gs.html
2. Click the link to load MiniMessage.xml into GGE under API examples.
3. Without making any changes then click the Preview Tab to run the Gadget
within GGE.

What is the expected output?
============================
It should allow the MiniMessage.xml Gadget to run inside GGE when you click
preview.

What is the actual output?
==========================
"Preview is not allowed for this file" in red text. See Error output below
please.

Which browsers have you experienced this on?
============================================
FireFox 2.0.0.14
Which operating systems have you experienced this on?
=====================================================
Windows Vista Home Premium - No SP1

Please provide any additional information below.

For minimsg.xml in GGE FireFox's Error Console gives this error:
Error: xml declaration not at start of external entity
Source File:
http://www.google.com/ig/ifr?url=gge.xml&nocache=1&synd=open&w=320&h=200&output=
html&up_preload_url=http%3A%2F%2Fdoc.examples.googlepages.com%2Fminimsg.xml
Line: 1, Column: 3
Source Code:
  <?xml version="1.0" encoding="UTF-8" ?>
  --^

For drag.xml in GGE using FireFox's Error Console gives this error:

Error: xml declaration not at start of external entity Source File: http://www.google.com/ig/ifr?url=gge.xml&nocache=1&synd=open&w=320&h=200&output= html&up_preload_url=http%3A%2F%2Fdoc.examples.googlepages.com%2Fdrag.xml Line: 1, Column: 3 Source Code: <?xml version="1.0" encoding="UTF-8" ?> --^

MiniMessage seems to load fine for preview in IE 7.0.6000.16643

Seperate Bug with different problems than above:
Google Blogs under popular examples prompts FireFox to "Install a Missing
plugin" needed for text/html when clicking on "Preview". lol Looks to be a
Header issues imo. Obviously no plugin should be needed for text/html! 

I have been experiencing problems with my own Gadgets as well. But since
something seems to be fundamentally broken here I am assuming this is the
cause of my other issues too.

Original issue reported on code.google.com by Bla...@gmail.com on 1 Jun 2008 at 2:15

[GoogleCodeExporter]

The GGE is unable to render the MiniMessage example due to the way it needs to
interact with the container. (GGE is only a pseudo-container and doesn't have 
full
functionality.)

Original comment by api.dwh%...@gtempaccount.com on 17 Jun 2008 at 5:16

• Changed state: WontFix