Anyone else experiencing this? When I use Ext 1.1b1's ability to upload files by posting the form in a dynamically-created IFRAME, in IE only the response from the POST appears in a new window (instead of in the hidden IFRAME). My fix, taken from this helpful thread, is as follows (inside Ext.data.Connection):

Code:
    doFormUpload : function(o, ps, url){
        var id = Ext.id();
        var frame = document.createElement('iframe');
        frame.id = id;
        frame.name = id;
        frame.className = 'x-hidden';
        if(Ext.isIE){
            frame.src = Ext.SSL_SECURE_URL;
        }
        document.body.appendChild(frame);
+
+       if(Ext.isIE){
+           document.frames[id].name = id;
+       }


        var form = Ext.getDom(o.form);
        form.target = id;
        form.method = 'POST';
        form.enctype = form.encoding = 'multipart/form-data';
        if(url){
            form.action = url;
        }
...