Some Gray Day

CS4 or CS5 along with OSX 10.5 or 10.6 have a problem doing grayscale.
What happens is that no matter what selections you make in PS the OS always
converts whatever you send it to a fixed profile. In 10.5 its
Generic Gray which
is a gamma 1.8 profile. In 10.6 its a new profile called Generic Gray Gamma 2.2
which you’d think was a gamma 2.2 curve but its not. The little glitch you see
in the graphs is exactly the conversion of Gray Gamma 2.2 to Generic GG 2.2.

Using CS3 is the easiest workaround currently.

Gripes Of

“I have said that Texas is a state of mind, but I think it is more than that. It is a mystique closely approximating a religion. And this is true to the extent that people either passionately love Texas or passionately hate it and, as in other religions, few people dare to inspect it for fear of losing their bearings in mystery or paradox. But I think there will be little quarrel with my feeling that Texas is one thing. For all its enormous range of space, climate, and physical appearance, and for all the internal squabbles, contentions, and strivings, Texas has a tight cohesiveness perhaps stronger than any other section of America. Rich, poor, Panhandle, Gulf, city, country, Texas is the obsession, the proper study and the passionate possession of all Texans.”
John Steinbeck, 1962