We have managed package that has global class implementing Schedulable interface (API 29.0). We could select this class under Apex Classes - > Schedule Apex while scheduling job in org where package is installed. After this org was upgraded with Summer 15 release preview past weekend class cannot be found in this popup even after search by exact name. System Administrator profile has this class enabled under Security page.
I wonder if anyone has faced with the same issue and if there are any ideas to resolve?