This backports the new fixedtoolbar plugin so that it works similarly on fix-blacklisted browsers like iOS4. With these files included, the toolbars will behave similarly to jQM 1.0 in browsers that don't support position:fixed properly, like iOS4.

Author: scottjehl

css/structure/jquery.mobile.fixedToolbar.polyfill.css

@@ -0,0 +1,11 @@
+/* fixed page header & footer configuration */
+.ui-faux-fixed .ui-header-fixed,
+.ui-faux-fixed .ui-footer-fixed {
+	position: absolute;
+}
+.ui-header-fixed.ui-fixed-hidden {
+	top: 0 !important;
+}
+.ui-footer-fixed.ui-fixed-hidden {
+	bottom: 0 !important;
+}

css/structure/jquery.mobile.structure.css

@@ -10,6 +10,7 @@
 @import url( "jquery.mobile.transitions.flow.css" );
 @import url( "jquery.mobile.grids.css" );
 @import url( "jquery.mobile.fixedToolbar.css" );
+@import url( "jquery.mobile.fixedToolbar.polyfill.css" );
 @import url( "jquery.mobile.navbar.css" );
 @import url( "jquery.mobile.button.css" );
 @import url( "jquery.mobile.collapsible.css" );

js/index.php

@@ -46,6 +46,7 @@
 	'jquery.mobile.controlGroup.js',
 	'jquery.mobile.links.js',
 	'jquery.mobile.fixedToolbar.js',
+	'jquery.mobile.fixedToolbar.polyfill.js',
 	'jquery.mobile.zoom.js',
 	'jquery.mobile.zoom.iosorientationfix.js',
 	'jquery.mobile.init.js'

js/jquery.mobile.fixedToolbar.polyfill.js

@@ -0,0 +1,63 @@
+//>>excludeStart("jqmBuildExclude", pragmas.jqmBuildExclude);
+//>>description: Polyfilled behavior for "fixed" headers and footers in browsers that don't support position:fixed
+//>>label: Fixedtoolbar
+
+define( [ "jquery", "./jquery.mobile.fixedToolbar" ], function( $ ) {
+//>>excludeEnd("jqmBuildExclude");
+(function( $, undefined ) {
+				
+		var supportBlacklist = $.mobile.fixedtoolbar.prototype.options.supportBlacklist;
+					
+		// If the browser is blacklisted for position:fixed support, polyfill it
+		if( supportBlacklist() ){
+				
+			// Add class for CSS hookage 
+			$( document.documentElement ).addClass( "ui-faux-fixed" );
+				
+			// Make the blacklist test return false, letting any normally-blacklisted browsers in to be polyfilled
+	  		$.mobile.fixedtoolbar.prototype.options.supportBlacklist = function(){ return false; };
+					
+			// Per page show, re-set up the event handling
+			$( document ).bind( "pagebeforeshow", function( e ){
+						
+				var page = $( e.target ),
+					fixies = page.find( ".ui-header-fixed, .ui-footer-fixed" ),
+					visibleAtStart,
+					resetPos = function(){
+						fixies.each(function(){
+							if( $(this).hasClass( "ui-header-fixed") ){
+								$( this ).css( "top", $( window ).scrollTop() + "px" );
+							}
+							else {
+								$( this ).css( "bottom", $.mobile.activePage.height() - $( window).scrollTop() - $.mobile.getScreenHeight() + "px" );
+							}
+						});
+					};
+						
+				// Normalize proper object for scroll event
+				( ( $( document ).scrollTop() === 0 ) ? $( window ) : $( document ) )
+					.bind( "scrollstart.fixed", function(){
+						visibleAtStart = fixies.not( ".ui-fixed-hidden" ).fixedtoolbar( "hide", true );
+					})
+					.bind( "scrollstop.fixed", function(){
+						resetPos();
+						visibleAtStart.fixedtoolbar( "show" );
+					});
+						
+				// on resize, reset positioning
+				$( window ).bind( "throttledresize.fixed", resetPos );
+
+				// on pagehide, unbind the event handlers
+				page.one( "pagehide", function(){
+					$( window ).add( this ).add( document ).unbind( ".fixed" );
+				});
+						
+				// align for pageshow
+				resetPos();
+			});
+		}
+
+})( jQuery );
+//>>excludeStart("jqmBuildExclude", pragmas.jqmBuildExclude);
+});
+//>>excludeEnd("jqmBuildExclude");