Some event reminder popups aren't being displayed. There's no apparent reason as to which reminder popups will work properly, although the problem seems to occur mostly with event reminders dated in the future or with reminders that use a custom reminder date/time (e.g. 16 days prior to the event). If I can't depend on the reminder popups then the calendar feature is useless to me.

Also, another slight annoyance is that the events cannot be sort by date, it refuses to sort them in chronological order. FYI...sort by name works.