My app (dress up challenge) works perfect on I.E when I (the appc reator) am loged in but no one else can see it working.

This happens only with I.E. Both I and everyone else can see it perfectly with Firefox...

Is it javascript? Have you tried putting some alerts in? a global alert, alerts at all 'handle response' type callback functions. alerts which dump out the contents of responsedata received and dom objects you try to grab?

Of course remember to take out all the alerts afterwards. having any alerts in there causes app rejection.

Of course remember to take out all the alerts afterwards. having any alerts in there causes app rejection.

Extracted from the guidelines: 

MySpace Applications and MySpace Application Content must not:

• feature false system messaging, warning messages, dialog boxes or error messages;
• contain Pop-ups;
  

My apps are also all iframe based  although I have a fair chunk of support javascript code to do some opensocial stuff and page manipulations.

Did you use the built in 'external iframe' radio? I've actually never tried using that. instead of doing that try switching to : html/javascript source

and putting in : <iframe src="whatever"/> 

You'll probly need opensocial js eventually anyway. 

"Did you use the built in 'external iframe' radio?"

 Yes, I did

 "instead of doing that try switching to : html/javascript source

and putting in : <iframe src="whatever"/> "

I try that but at the canvas page shows  ->  <[frame] src="whatever"></[iframe]>

it did not load the iframe.. 

huh really? I just put the following line in as the only line on the canvas of an app.

 <iframe src="http://stabilize.net"/>

It worked fine. what shows up on your canvas looks sorta weird are you sure you didn't mistype the iframe tag somehow?

I tryed with   <iframe src="http://mysite.net"/> and I got the error mesage  "the page is not redirecting properly, This problem can sometimes be caused by disabling or refusing to accept cookies. ".. While I.E. displayed a blank page..