You may have noticed that the Gmail Burglar Alarm could have stopped working some days ago. To get the application back working, simply, delete the calendars corresponding to the application.
The new calendars would be created once the application is activated again.
This was because of some issues with the calendar and the token that is used to access the calendar data. The issue seemed to spring up because of the way non-primary calendars were handled at Google Calendar. Deleting the calendar resets the token and this new token is used to add events to Google Calendar.
On a side note, I am also working on converting the plain and simple tabular data into better visualizations using Google Visualization API.