Derp, had parseInt on the brain. Thanks karbassi in 6541eb9d.

src/dimensions.js

@@ -8,14 +8,14 @@ jQuery.each([ "Height", "Width" ], function( i, name ) {
 	// innerHeight and innerWidth
 	jQuery.fn["inner" + name] = function() {
 		return this[0] ?
-			parseFloat( jQuery.css( this[0], type, "padding" ), 10 ) :
+			parseFloat( jQuery.css( this[0], type, "padding" ) ) :
 			null;
 	};
 
 	// outerHeight and outerWidth
 	jQuery.fn["outer" + name] = function( margin ) {
 		return this[0] ?
-			parseFloat( jQuery.css( this[0], type, margin ? "margin" : "border" ), 10 ) :
+			parseFloat( jQuery.css( this[0], type, margin ? "margin" : "border" ) ) :
 			null;
 	};
 
@@ -50,7 +50,7 @@ jQuery.each([ "Height", "Width" ], function( i, name ) {
 				// Get or set width or height on the element
 				size === undefined ?
 					// Get width or height on the element
-					parseFloat( jQuery.css( elem, type ), 10 ) :
+					parseFloat( jQuery.css( elem, type ) ) :
 
 					// Set the width or height on the element (default to pixels if value is unitless)
 					this.css( type, typeof size === "string" ? size : size + "px" );

src/effects.js

@@ -316,7 +316,7 @@ jQuery.fx.prototype = {
 			return this.elem[ this.prop ];
 		}
 
-		var r = parseFloat( jQuery.css( this.elem, this.prop ), 10 );
+		var r = parseFloat( jQuery.css( this.elem, this.prop ) );
 		return r && r > -10000 ? r : 0;
 	},