Subject: Has there been a fifth type of 'taste' described?

Oh help me, please, Dr. Mad Scientists!

I seem to recall reading in a respectable newspaper (The Times, I 
think) that researchers have described a fifth type of taste, in 
addition to sweet, sour, bitter, and salty.  I spouted off about it to 
a couple of co-workers and now cannot find any information to back it 
up.  

Please, oh please tell me it's true and not a figment of my over-
active imagination or a remnant dream that encroached on my conscious 
mind.  My status as "that know-it-all" is on the line.

Peter

Re: Has there been a fifth type of 'taste' described?