I recently upgraded our school moodle from 1.9.7+ to 2.1.1+ and I have noticed some things different in the calendar. First if you are in a course from My Home and go to the calendar and then try to switch to a different course fromt the drop down at the top of the course it doesn't switch to that couse as an admin. Then as an admin again on my home all the couse events I put in to the cousres I am teaching don't show up on my calendar on My Home page calendar. So, if I was teach several classes I could go to MY Home and just check the calendar for what was on tap for the day. Is this being worked on or a known problem or is it just me???
It is not just you!
We have teachers who have multiple Moodle courses. In 1.9.7 they were able to add content to a calendar for one course and then use the drop down menu at the top to quickly switch to the calendar of another course to add content there.
In 2.1.1 the drop down menu is there and the correct courses show up in the menu, but nothing happens when we try to select a different course.
I'll check if this has been posted in Tracker.
See if this works for you:
Change line 681 of calendar/renderer.php to: $select = new single_select(new moodle_url(CALENDAR_URL.'view.php', array('return' => $returnurl, 'view' => 'month')), 'course', $courseoptions, $selected, null);