diff --git a/typo3_src-4.5.29/typo3/sysext/saltedpasswords/classes/tasks/class.tx_saltedpasswords_tasks_bulkupdate.php b/typo3_src-4.5.29/typo3/sysext/saltedpasswords/classes/tasks/class.tx_saltedpasswords_tasks_bulkupdate.php
index 54d7fab..270e3f4 100644
--- a/typo3_src-4.5.29/typo3/sysext/saltedpasswords/classes/tasks/class.tx_saltedpasswords_tasks_bulkupdate.php
+++ b/typo3_src-4.5.29/typo3/sysext/saltedpasswords/classes/tasks/class.tx_saltedpasswords_tasks_bulkupdate.php
@@ -105,6 +105,24 @@ class tx_saltedpasswords_Tasks_BulkUpdate extends tx_scheduler_Task {
 		return(TRUE);
 	}
 
+    /**
+     * Determine if the database password field length can contain Blowfish with MD5 prefix
+     * 
+     * @param mixed $tableName Description.
+     * @access protected
+     * @return boolean true if long enough, false if not.
+     */
+	protected function checkPasswordColumnLength($tableName) {
+		$fields = $GLOBALS['TYPO3_DB']->admin_get_fields($tableName);
+		if(	is_array($fields['password']) &&
+			!empty($fields['password']['Type']))
+		{
+			//should be varchar(##). If not, cast to 0
+			$fieldLength = (int) substr($fields['password']['Type'], 8, -1);
+			return ($fieldLength <= 60) ? false : true;
+		}
+	}
+
 	/**
 	 * Find next set of frontend or backend users to update.
 	 *
@@ -112,6 +130,9 @@ class tx_saltedpasswords_Tasks_BulkUpdate extends tx_scheduler_Task {
 	 * @return array Rows with uid and password
 	 */
 	protected function findUsersToUpdate($mode) {
+		if(!$this->checkPasswordColumnLength(strtolower($mode) . '_users')){
+			throw new Exception(sprintf("The password field length in table %s needs to be at least 61 characters.", strtolower($mode) . '_users'));
+		}
 		$usersToUpdate = $GLOBALS['TYPO3_DB']->exec_SELECTgetRows(
 			'uid, password',
 			strtolower($mode) . '_users',
diff --git a/typo3_src-4.5.29/typo3/sysext/saltedpasswords/locallang.xml b/typo3_src-4.5.29/typo3/sysext/saltedpasswords/locallang.xml
index 2a67721..22b8ead 100644
--- a/typo3_src-4.5.29/typo3/sysext/saltedpasswords/locallang.xml
+++ b/typo3_src-4.5.29/typo3/sysext/saltedpasswords/locallang.xml
@@ -9,7 +9,7 @@
 			<label index="ext.saltedpasswords.title.tx_saltedpasswords_salts_phpass">Portable PHP password hashing (phpass)</label>
 			<label index="ext.saltedpasswords.title.tx_saltedpasswords_salts_md5">MD5 salted hashing (secure)</label>
 			<label index="ext.saltedpasswords.title.tx_saltedpasswords_salts_blowfish">Blowfish salted hashing (advanced)</label>
-			<label index="ext.saltedpasswords.tasks.bulkupdate.name">Convert user passwords to salted hashes</label>
+			<label index="ext.saltedpasswords.tasks.bulkupdate.name">Convert user passwords to salted hashes. This task will not work until the password field length is at least 61 characters.</label>
 			<label index="ext.saltedpasswords.tasks.bulkupdate.description">Update all frontend and backend user passwords to salted hashes. This task deactivates itself when completed.</label>
 		</languageKey>
 	</data>