A few days ago, requestShareApp doesn't worked. 

Even if I've fixed code as http://developer.myspace.com/Community/blogs/devteam/archive/2009/07/31/fix-for-appinvites-and-iframe-app.aspx,

It doesn't worked.

Please, anyone let me know why & how to fix it !!!

Can you tell me your setup - container/ iframe or not etc.

Just go to any app!  requestShareApp has been broken for 2 days! It doesn't happen all the time, but most apps have broken dialogs.  We complained about this in another topic.  

Just an example: 

http://profile.myspace.com/Modules/Applications/Pages/Canvas.aspx?appId=105844

After clicking send on an invite we get this inside the javascript popup. 

http://i28.tinypic.com/8jnm.png

I've tested some cases.

Chrom and IE6 and Safari was ok. But, FF 3.5 and  IE8 ( as emulated IE7 mode) doesn't worked.

Lastly, I know that prototype.js has conflict with "RpcContainer.000.js" or "IFPC_externalIframe005.js"

 If you include http://ajax.googleapis.com/ajax/libs/prototype/1.6.0.3/prototype.js" in IFPCExampleInternal.html,

it will be not worked properly. (in IE8) 

I think that MDP team must more test many cases.

append1.  I found that prototype.js extends Array.prototype.toJSON.

 If you insert following code after include prototype.js, all IFPC call is ok.

 ------------------------------------------
 <script>
if (window.JSON) {
        delete Array.prototype.toJSON;
}
</script>

 ------------------------------------------

I don't know why extened toJSON has problem.

Please, check this problem. (FF 3.5 has same problem)