double quote handling?

I am running PG 7.2b5 on a Mac OSX (10.1.2) This is my test box at 
home. In the office I run 7.1.3 on SUSE linux.

I did not find in the changes faq any reference to the handling of 
double quotes. In my testing at home I noticed that 7.2 was 
accepting:

update table set col = 'this is a "test"' where col2 = '1800';

Maybe I was wrong, but I thought I had to escape the double quotes. 
Is this a change, or have I been doing a lot of work for naught?

Ted