Index: branches/5.2.x/core/install/upgrades.php
===================================================================
diff -u -N -r15448 -r15449
--- branches/5.2.x/core/install/upgrades.php	(.../upgrades.php)	(revision 15448)
+++ branches/5.2.x/core/install/upgrades.php	(.../upgrades.php)	(revision 15449)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: upgrades.php 15448 2012-07-16 11:17:19Z alex $
+* @version	$Id: upgrades.php 15449 2012-07-16 11:22:24Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -2236,5 +2236,59 @@
 
 			$sql = 'DELETE FROM ' . TABLE_PREFIX . 'SystemSettings WHERE VariableName = "QuickCategoryPermissionRebuild"';
 			$this->Conn->Query($sql);
+
+			$this->_updateScheduledTaskRunSchedule();
 		}
+
+		/**
+		 * Transforms RunInterval into RunSchedule column for Scheduled Tasks
+		 *
+		 * @return void
+		 * @access protected
+		 */
+		protected function _updateScheduledTaskRunSchedule()
+		{
+			// minute hour day_of_month month day_of_week
+			$id_field = $this->Application->getUnitOption('scheduled-task', 'IDField');
+			$table_name = $this->Application->getUnitOption('scheduled-task', 'TableName');
+
+			$sql = 'SELECT RunInterval, ' . $id_field . '
+					FROM ' . $table_name;
+			$run_intervals = $this->Conn->GetCol($sql, $id_field);
+
+			$ranges = Array (0 => 'min', 1 => 'hour', 2 => 'day', 3 => 'month');
+			$range_values = Array ('min' => 60, 'hour' => 60, 'day' => 24, 'month' => 30);
+			$range_masks = Array ('min' => '*/%s * * * *', 'hour' => '0 */%s * * *', 'day' => '0 0 */%s * *', 'month' => '0 0 1 */%s *');
+
+			foreach ($run_intervals as $scheduled_task_id => $interval) {
+				$mask_index = 'month';
+
+				foreach ($ranges as $range_index => $range_name) {
+					$range_value = $range_values[$range_name];
+
+					if ( $interval >= $range_value ) {
+						$interval = ceil($interval / $range_value);
+					}
+					else {
+						$mask_index = $ranges[$range_index - 1];
+						break;
+					}
+				}
+
+				$run_schedule = sprintf($range_masks[$mask_index], $interval);
+
+				if ( $run_schedule == '0 0 */7 * *' ) {
+					// once in 7 days = once in a week
+					$run_schedule = '0 0 * * 0';
+				}
+
+				$run_schedule = preg_replace('/(\*\/1( |$))/', '*\\2', $run_schedule);
+
+				$fields_hash = Array ('RunSchedule' => $run_schedule);
+				$this->Conn->doUpdate($fields_hash, $table_name, $id_field . ' = ' . $scheduled_task_id);
+			}
+
+			// drop RunInterval column
+			$this->Conn->Query('ALTER TABLE ' . $table_name . ' DROP RunInterval');
+		}
 	}
\ No newline at end of file