diff --git a/lib/abi.js b/lib/abi.js
index cae4f7519..1a88317bc 100644
--- a/lib/abi.js
+++ b/lib/abi.js
@@ -84,6 +84,18 @@ var calcRealPadding = function (type, expected) {
 
 var setupInputTypes = function () {
     
+    // convert from int, decimal-string, prefixed hex string whatever into a bare hex string.
+    var formatStandard = function (value) {
+        if (typeof value === "number")
+            return value.toString(16);
+        else if (typeof value === "string" && value.indexOf('0x') === 0)
+            return value.substr(2);
+        else if (typeof value === "string")
+            return web3.toHex(value);
+        else
+            return (+value).toString(16);
+    };
+
     var prefixedType = function (prefix, calcPadding) {
         return function (type, value) {
             var expected = prefix;
@@ -98,15 +110,7 @@ var setupInputTypes = function () {
 
             if (prefix === "string")
                 return web3.fromAscii(value, padding).substr(2);
-            if (typeof value === "number")
-                value = value.toString(16);
-            else if (typeof value === "string")
-                value = web3.toHex(value); 
-            else if (value.indexOf('0x') === 0)
-                value = value.substr(2);
-            else
-                value = (+value).toString(16);
-            return padLeft(value, padding * 2);
+            return padLeft(formatStandard(value), padding * 2);
         };
     };
 
@@ -123,7 +127,7 @@ var setupInputTypes = function () {
     };
 
     var formatBool = function (value) {
-        return value ? '0x1' : '0x0';
+        return value ? '01' : '00';
     };
 
     return [
@@ -133,7 +137,7 @@ var setupInputTypes = function () {
         prefixedType('string', calcBytePadding),
         prefixedType('real', calcRealPadding),
         prefixedType('ureal', calcRealPadding),
-        namedType('address', 20),
+        namedType('address', 20, formatStandard),
         namedType('bool', 1, formatBool),
     ];
 };