diff --git a/CHANGELOG b/CHANGELOG
index e803f08..a980cdb 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+* Re-throw error in otherwise-empty `catch` clause so that `PeriodicalExecuter` does not suppress exceptions. (Samuel Lebeau)
+
 * Fix issue related to escaping of selectors for querySelectorAll. [#559 state:resolved] (Jorn Holm)
 
 *1.6.1_rc3* (June 16, 2009)
diff --git a/src/lang/periodical_executer.js b/src/lang/periodical_executer.js
index 8086372..aca00f8 100644
--- a/src/lang/periodical_executer.js
+++ b/src/lang/periodical_executer.js
@@ -53,7 +53,8 @@ var PeriodicalExecuter = Class.create({
         this.currentlyExecuting = true;
         this.execute();
       } catch(e) {
-        /* empty catch for clients that don't support try/finally */
+        // Catch clause for clients that don't support try/finally.
+        throw e;
       }
       finally {
         this.currentlyExecuting = false;