AJAX Safari Problems w/ Scriptaculous and Prototype

[Xaqte]

I've recently been working alot with Scriptaculous and Prototype and I've got some good looking results in FF and IE. However, Safari is killing me! I would love for someone to look at this, and tell me if its my design or the libraries.

One example:

http://www.tankdb.com/src/report_demo.php

1. Checkout the above page
2. Choose August 2000
3. Choose "Download Package Two"

What happens beneath the hood:
OnClick =

function getpdf() {
	Effect.Appear('progress');
	rndractivity();
	setTimeout('Poll()', 2000);
	PollAttempts = 0;
}
// While report is loading, disable report interaction ability 

function rndractivity() {
	Effect.BlindDown('block');
	Form.disable(document.forms['welcome1']);
	Form.disable(document.forms['welcome2']);
	new Effect.Opacity('block',
			{ duration: 2.0, 
transition: Effect.Transitions.linear, 
from: 1.0, to: 0.5 });
}

//Goes to php page, get txt status msg and passes it to the update function 

function Poll()
{
	Event.unloadCache();	    
	new Ajax.Request('observer.php', {
	method: "get",	
	asynchronous: true,	
	onComplete:function(request) {update(request.responseText);}
	});
}

//Gets called by poll() to see if request is completed, if not it tries one more time

var PollAttempts = 0;
function update (request) {
	if(!request.match(/^Completed/)) {
		PollAttempts++;
		if(PollAttempts <= 1) {
			Poll();
		}
	}
	handelrequest();
}

function handelrequest() {
	//Make the Progress Bar Disappear
	enblactivty();
	new Effect.Fade('progress');
}	

function enblactivty() {
	Effect.BlindUp('block');
	Form.enable(document.forms['welcome1']);
	Form.enable(document.forms['welcome2']);
	Form.reset(document.forms['welcome1']);
	Form.reset(document.forms['welcome2']);
}

I tried posting all the revelant code in the order they are called.

Any help,thoughts or suggestions would greatly be appreciated!

Thanks,

X