Index: class.tx_scheduler_task.php
===================================================================
--- class.tx_scheduler_task.php	(revision 1114)
+++ class.tx_scheduler_task.php	(working copy)
@@ -121,8 +121,9 @@
 	 * It MUST be implemented by all classes inheriting from this one
 	 * Note that there is no error handling, errors and failures are expected
 	 * to be handled and logged by the client implementations.
+	 * Should return true on successful execution, false on error.
 	 *
-	 * @return void
+	 * @return boolean	Returns true on successful execution, false on error
 	 */
 	abstract public function execute();
 
@@ -427,10 +428,11 @@
 	/**
 	 * Removes given execution from list
 	 *
-	 * @param	integer		$executionID: id of the execution to remove
+	 * @param	integer		Id of the execution to remove.
+	 * @param	boolean		Status of the last execution, true for success, false to represent an error.
 	 * @return	void
 	 */
-	public function unmarkExecution($executionID) {
+	public function unmarkExecution($executionID, $successfullyExecuted = false) {
 			// Get the executions for the task
 		$queryArr = array(
 			'SELECT' => 'serialized_executions',
@@ -456,7 +458,10 @@
 				$GLOBALS['TYPO3_DB']->exec_UPDATEquery(
 					'tx_scheduler_task',
 					'uid = ' . intval($this->taskUid),
-					array('serialized_executions' => $runningExecutionsSerialized)
+					array(
+						'serialized_executions' => $runningExecutionsSerialized,
+						'lastexecution_success' => (int) $successfullyExecuted
+					)
 				);
 			}
 		}
Index: mod1/index.php
===================================================================
--- mod1/index.php	(revision 1115)
+++ mod1/index.php	(working copy)
@@ -860,6 +860,11 @@
 					$executionStatus  = 'disabled';
 				}
 
+					// a failure is the worst thing that could happen, so it must overwrite all other statuses
+				if (!empty($schedulerRecord['lastexecution_time'])  && !$schedulerRecord['lastexecution_success']) {
+					$executionStatus  = 'failure';
+				}
+
 					// formatting the execution status
 				$executionStatus = '<img ' . t3lib_iconWorks::skinImg(t3lib_extMgm::extRelPath('scheduler'), 'res/gfx/status_' . $executionStatus . '.png') . ' alt="' . $GLOBALS['LANG']->getLL('status.' . $executionStatus) . '" />';
 
@@ -889,10 +894,11 @@
 
 		$content .= '<p class="status-legend">' . $GLOBALS['LANG']->getLL('status.legend') . ':</p>
 		<ul>
-			<li><img ' . t3lib_iconWorks::skinImg(t3lib_extMgm::extRelPath('scheduler'), 'res/gfx/status_disabled.png') . ' alt="' . $GLOBALS['LANG']->getLL('status.disabled') . '" /> ' . $GLOBALS['LANG']->getLL('status.legend.disabled') . '</li>
-			<li><img ' . t3lib_iconWorks::skinImg(t3lib_extMgm::extRelPath('scheduler'), 'res/gfx/status_stopped.png') . ' alt="' . $GLOBALS['LANG']->getLL('status.stopped') . '" /> ' . $GLOBALS['LANG']->getLL('status.legend.stopped') . '</li>
+			<li><img ' . t3lib_iconWorks::skinImg(t3lib_extMgm::extRelPath('scheduler'), 'res/gfx/status_failure.png') . ' alt="' . $GLOBALS['LANG']->getLL('status.failure') . '" /> ' . $GLOBALS['LANG']->getLL('status.legend.failure') . '</li>
 			<li><img ' . t3lib_iconWorks::skinImg(t3lib_extMgm::extRelPath('scheduler'), 'res/gfx/status_scheduled.png') . ' alt="' . $GLOBALS['LANG']->getLL('status.scheduled') . '" /> ' . $GLOBALS['LANG']->getLL('status.legend.scheduled') . '</li>
 			<li><img ' . t3lib_iconWorks::skinImg(t3lib_extMgm::extRelPath('scheduler'), 'res/gfx/status_running.png') . ' alt="' . $GLOBALS['LANG']->getLL('status.running') . '" /> ' . $GLOBALS['LANG']->getLL('status.legend.running') . '</li>
+			<li><img ' . t3lib_iconWorks::skinImg(t3lib_extMgm::extRelPath('scheduler'), 'res/gfx/status_stopped.png') . ' alt="' . $GLOBALS['LANG']->getLL('status.stopped') . '" /> ' . $GLOBALS['LANG']->getLL('status.legend.stopped') . '</li>
+			<li><img ' . t3lib_iconWorks::skinImg(t3lib_extMgm::extRelPath('scheduler'), 'res/gfx/status_disabled.png') . ' alt="' . $GLOBALS['LANG']->getLL('status.disabled') . '" /> ' . $GLOBALS['LANG']->getLL('status.legend.disabled') . '</li>
 		</ul>';
 
 
Index: mod1/locallang.xml
===================================================================
--- mod1/locallang.xml	(revision 1115)
+++ mod1/locallang.xml	(working copy)
@@ -88,10 +88,12 @@
 			<label index="status.legend">Status Legend</label>
 			<label index="status.legend.disabled">Disabled, will not be executed</label>
 			<label index="status.legend.stopped">Stopped, currently not running</label>
+			<label index="status.legend.failure">Failure! An error occured during the last execution.</label>
 			<label index="status.legend.scheduled">Late, runs with next execution</label>
 			<label index="status.legend.running">Currently running</label>
 			<label index="status.disabled">disabled</label>
 			<label index="status.stopped">stopped</label>
+			<label index="status.failure">failure</label>
 			<label index="status.scheduled">scheduled</label>
 			<label index="status.running">running</label>
 		</languageKey>
Index: ext_tables.sql
===================================================================
--- ext_tables.sql	(revision 1114)
+++ ext_tables.sql	(working copy)
@@ -8,6 +8,7 @@
 	crid varchar(255) DEFAULT '' NOT NULL,
 	nextexecution int(11) unsigned DEFAULT '0' NOT NULL,
 	lastexecution_time int(11) unsigned DEFAULT '0' NOT NULL,
+	lastexecution_success int(1) unsigned DEFAULT '0' NOT NULL,
 	lastexecution_context char(3) DEFAULT '' NOT NULL,
 	serialized_task_object text NOT NULL,
 	serialized_executions text NOT NULL,
Index: examples/class.tx_scheduler_sleeptask.php
===================================================================
--- examples/class.tx_scheduler_sleeptask.php	(revision 1114)
+++ examples/class.tx_scheduler_sleeptask.php	(working copy)
@@ -55,6 +55,8 @@
 		}
 
 		sleep($time);
+
+		return true;
 	}
 }
 
Index: examples/class.tx_scheduler_testtask.php
===================================================================
--- examples/class.tx_scheduler_testtask.php	(revision 1114)
+++ examples/class.tx_scheduler_testtask.php	(working copy)
@@ -49,6 +49,7 @@
 	 * @return	void
 	 */
 	public function execute() {
+		$success = false;
 
 		if (!empty($this->email)) {
 				// If an email address is defined, send a message to it
@@ -100,11 +101,13 @@
 			$mailer->setRecipient($this->email);
 			$mailer->setHeaders();
 			$mailer->setContent();
-			$mailer->sendtheMail();
+			$success = $mailer->sendtheMail();
 		} else {
 				// No email defined, just log the task
 			t3lib_div::devLog('[tx_scheduler_testtask]: No email address given', 'scheduler', 2);
 		}
+
+		return $success;
 	}
 }
 
Index: class.tx_scheduler.php
===================================================================
--- class.tx_scheduler.php	(revision 1114)
+++ class.tx_scheduler.php	(working copy)
@@ -203,10 +203,10 @@
 			$executionID = $task->markExecution();
 
 				// Execute task
-			$task->execute();
+			$successfullyExecuted = $task->execute();
 
 				// Unregister excution
-			$task->unmarkExecution($executionID);
+			$task->unmarkExecution($executionID, $successfullyExecuted);
 
 				// Log completion of execution
 			$GLOBALS['BE_USER']->writelog(