Running 1.7.4 over here, and got one user with tons of errors showing up in their logs:

E0719 19:11:38.142241 8654848 events.cpp:424] Could not put Event Record key: records.iokit.hardware_events
E0719 19:17:10.605443 9191424 scheduler.cpp:100] Error adding new results to database: IOError: Permission denied