Steps to reproduce:

1. Login as a user with editing teacher rights to more than one course.
2. Attempt to restore a course backup.

Expected result:

You are given the option to choose which course to restore to.

Actual result:

You can only restore to the course you're currently in.

Thanks to Barbara Baldwin for reporting this issue first: http://moodle.org/mod/forum/discuss.php?d=123155