The idea is that the upload button never gets shown until sfwupload loads. It works in newer IE and other browsers, but not on IE6. This is how I do it:

1) I have this in my settings:
swfupload_loaded_handler : swfUploadLoaded,

2) I have this in my handlers:
function swfUploadLoaded() {
// reveal button when swfupload loads
var btnSelect = document.getElementById("btnSelect");
btnSelect.style.display = '' ;
}

3) This is the button in question on the page (edited in obvious way to show on this post):
(I replaced the HTML tag arrows with [ and ])
[input id="btnSelect" type="button" onclick="swfu.selectFiles()" style="display:none;" /]

This way the button is displayed only AFTER swfUploadLoaded is called, but the button is never displayed on IE6. Furthermore, when I get rid of the swfupload_loaded_handler completely and display the button permanently, the selectFiles() never executes (only on IE6), aka, the browsing interface never comes up.

I guess that the handler doesn't get called at all! Any ideas on why the sequence doesn't finish or how to fix this?