1 files changed, 2 insertions, 2 deletions
diff --git a/store.js b/store.js
index b17fb49..d4a2b64 100644
--- a/store.js
+++ b/store.js
@@ -61,7 +61,7 @@ SyntaxElementMorph, Variable*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.store = '2015-February-28';
+modules.store = '2015-March-15';
 
 
 // XML_Serializer ///////////////////////////////////////////////////////
@@ -782,7 +782,7 @@ SnapSerializer.prototype.loadCustomBlocks = function (
 
         names = definition.parseSpec(definition.spec).filter(
             function (str) {
-                return str.charAt(0) === '%';
+                return str.charAt(0) === '%' && str.length > 1;
             }
         ).map(function (str) {
             return str.substr(1);