diff --git a/history.txt b/history.txt
index 21d038cd..bc49af26 100755
--- a/history.txt
+++ b/history.txt
@@ -2455,4 +2455,5 @@ ______
 150228
 ------
 * Blocks, Store, GUI: Cache inputs, accelerates evaluating recursive reporters and warped / turbo recursive commands by up to 40%
-* Objects: slightly optimize warped / turbo execution 
+* Objects: slightly optimize warped / turbo execution
+* Threads: fixed #715
diff --git a/threads.js b/threads.js
index e07059fd..50af8dde 100644
--- a/threads.js
+++ b/threads.js
@@ -83,7 +83,7 @@ ArgLabelMorph, localize, XML_Element, hex_sha512*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.threads = '2015-January-12';
+modules.threads = '2015-February-28';
 
 var ThreadManager;
 var Process;
@@ -1926,7 +1926,7 @@ Process.prototype.reportTypeOf = function (thing) {
     if (thing === true || (thing === false)) {
         return 'Boolean';
     }
-    if (!isNaN(parseFloat(thing))) {
+    if (!isNaN(+thing)) {
         return 'number';
     }
     if (isString(thing)) {