FATAL 1: Database "template0" is not currently accepting connections?

Out of the blue I received this error running 7.2 on win 2k

 

FATAL 1:  Database "template0" is not currently accepting connections

the immediate query was a select on a database but not template0.

 

I am curious to know if anyone has experienced this or might know the cause and / or cure.

 

thanks

don