I am unable to open the Mail application on my N9. The application simply does not launch.
Tapping the application icon causes the icon to blink, like all the other icons, but there is no other response.
All the other system apps (messages, phone) work fine.

I have been using Mail on the N9 for more than a year now without any such issue, and I haven't changed any settings recently.

Any help would be appreciated..

(I am using version PR1.3)

Edit:
Further, none of the items (i.e. Installations, Calendar, Contacts, Mail, etc.) in the Settings > Applications menu opens either.