Index: themes/base/jquery.ui.core.css
===================================================================
--- themes/base/jquery.ui.core.css	(revision 3860)
+++ themes/base/jquery.ui.core.css	(working copy)
@@ -30,8 +30,33 @@
 .ui-icon { display: block; text-indent: -99999px; overflow: hidden; background-repeat: no-repeat; }
 
 
 /* Misc visuals
 ----------------------------------*/
 
 /* Overlays */
 .ui-widget-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
+
+/* High contrast compatibility
++----------------------------------*/
+.high-contrast .ui-icon,
+.high-contrast .ui-dialog .ui-dialog-titlebar-close,
+.high-contrast .ui-datepicker .ui-datepicker-next,
+.high-contrast .ui-datepicker .ui-datepicker-prev
+{ width: auto; text-indent: 0; }
+
+/* Focus highlight for tabs */
+.high-contrast .ui-tabs.ui-widget-content .ui-state-focus { border-width: 3px; }
+
+/* Focus highlight for accordion (also out of high contrast, maybe that needs to go somewhere else? */
+.ui-accordion-header.ui-state-focus { border-width: 2px; }
+.high-contrast .ui-accordion-header.ui-state-focus { border-width: 4px; }
+
+/* Fancy positioning for datepicker buttons: */
+.high-contrast .ui-datepicker .ui-datepicker-next span { position: static; margin: 3px; }
+.high-contrast .ui-datepicker .ui-datepicker-prev span { position: static; margin: 3px; }
+
+/* Value for progress bar */
+
+.ui-progressbar-valuetext { display: none; }
+.high-contrast .ui-progressbar-valuetext { display: block; position: relative; margin: 0; margin-top: 3px; top: -100%; width: 100%; text-align: center; }
+
Index: ui/jquery.ui.core.js
===================================================================
--- ui/jquery.ui.core.js	(revision 3860)
+++ ui/jquery.ui.core.js	(working copy)
@@ -197,9 +197,39 @@ $.extend($.expr[':'], {
 	},
 
 	tabbable: function(element) {
 		var tabIndex = $.attr(element, 'tabindex');
 		return (isNaN(tabIndex) || tabIndex >= 0) && $(element).is(':focusable');
 	}
 });
 
+// Initialize high-contrast mode check when we have document.body
+$(function() {
+	// create div for testing if high contrast mode is on or images are turned off
+	var div = document.createElement("div");
+	// The ui-icon class will give it a background image.
+	// Proper caching should mean no additional requests will be made.
+	div.className = "ui-icon";
+	div.style.borderWidth = "1px";
+	div.style.borderStyle = "solid";
+	div.style.borderTopColor = "red";
+	div.style.borderRightColor = "green";
+	div.style.position = "absolute";
+	div.style.top = "-999px";
+	document.body.appendChild(div);
+
+	// test it
+	var bkImg = $.curCSS(div, "backgroundImage");
+	$.highContrast = ($.curCSS(div, "borderTopColor") == $.curCSS(div, "borderRightColor")) ||
+		(bkImg != null && (bkImg == "none" || bkImg == "url(invalid-url:)"));
+	if ($.browser.msie) {
+		div.outerHTML = "";		// prevent mixed-content warning, see http://support.microsoft.com/kb/925014
+	} else {
+		document.body.removeChild(div);
+	}
+	if ($.highContrast) {
+		$("body").addClass("high-contrast");
+	}
+});
+
+
 })(jQuery);
Index: ui/jquery.ui.progressbar.js
===================================================================
--- ui/jquery.ui.progressbar.js	(revision 3860)
+++ ui/jquery.ui.progressbar.js	(working copy)
@@ -24,16 +24,19 @@ $.widget( "ui.progressbar", {
 				role: "progressbar",
 				"aria-valuemin": this._valueMin(),
 				"aria-valuemax": this._valueMax(),
 				"aria-valuenow": this._value()
 			});
 
 		this.valueDiv = $( "<div class='ui-progressbar-value ui-widget-header ui-corner-left'></div>" )
 			.appendTo( this.element );
+	
+ 		this.valueTextDiv = $( "<div class='ui-progressbar-valuetext'>" + this._value() + "</div>")
+ 			.appendTo( this.element );
 
 		this._refreshValue();
 	},
 
 	destroy: function() {
 		this.element
 			.removeClass( "ui-progressbar ui-widget ui-widget-content ui-corner-all" )
 			.removeAttr( "role" )
@@ -91,16 +94,17 @@ $.widget( "ui.progressbar", {
 		return 100;
 	},
 
 	_refreshValue: function() {
 		var value = this.value();
 		this.valueDiv
 			[ value === this._valueMax() ? "addClass" : "removeClass"]( "ui-corner-right" )
 			.width( value + "%" );
+ 		this.valueTextDiv.text(value + "%");
 		this.element.attr( "aria-valuenow", value );
 	}
 });
 
 $.extend( $.ui.progressbar, {
 	version: "@VERSION"
 });
 
Index: ui/jquery.ui.button.js
===================================================================
--- ui/jquery.ui.button.js	(revision 3860)
+++ ui/jquery.ui.button.js	(working copy)
@@ -205,17 +205,17 @@ $.widget( "ui.button", {
 			buttonText = $( "<span></span>" )
 				.addClass( "ui-button-text" )
 				.html( this.options.label )
 				.appendTo( buttonElement.empty() )
 				.text();
 
 		var icons = this.options.icons,
 			multipleIcons = icons.primary && icons.secondary;
-		if ( icons.primary || icons.secondary ) {
+		if ( !$.highContrast && ( icons.primary || icons.secondary ) ) {
 			buttonElement.addClass( "ui-button-text-icon" +
 				( multipleIcons ? "s" : "" ) );
 			if ( icons.primary ) {
 				buttonElement.prepend( "<span class='ui-button-icon-primary ui-icon " + icons.primary + "'></span>" );
 			}
 			if ( icons.secondary ) {
 				buttonElement.append( "<span class='ui-button-icon-secondary ui-icon " + icons.secondary + "'></span>" );
 			}