1.6.1 vs 1.6 change was:
diff -r public/assets/javascript/og/CalendarFunctions.js ../fengoffice16/public/assets/javascript/og/CalendarFunctions.js
235c235
< og.createMonthlyViewDrag = function(div_id, obj_id, is_repetitive, type, origdate) {
---
> og.createMonthlyViewDrag = function(div_id, obj_id, is_repetitive, origdate, type) {
----------------------------
need to change application/views/event/calendar.php line 390:
og.createMonthlyViewDrag('m_ms_div_<?php echo $milestone->getId() ?>', '<?php echo $milestone->getId()?>', false, 'milestone'); // Drag
It is solution.
Best regards,
Vladlen.