Absolutely position animations, damn my twichy fingers for commiting too soon.

src/fx.js

@@ -111,9 +111,12 @@ jQuery.fn.extend({
 						}
 
 						// If a +/- token was provided, we're doing a relative animation
-						if ( parts[1] && typeof val != "number" )
+						if ( parts[1] )
 							end = ((parts[1] == "-" ? -1 : 1) * end) + start;
 
+            // Absolutely position numbers
+            if( typeof val == "number") end = val;
+
 						e.custom( start, end, unit );
 					} else
 						e.custom( start, val, "" );