Text/font edges are not sharp / getting distorted

Hi,

I have created an Application using Wizard like design with the help of 
NSView.
But all the text displayed in each page, even all labels also gets 
distorted.
Like the all the font edges are not sharp and font edges are seen to be 
dsitorted.
Think its some thing related to Anti-aliasing

I made a screen shot and saved In my Mac Book. I have transfered the 
saved png image
to my Windows PC. But interestingly the screen shot when viewed in 
Windows don't have that problem.
Text are crystal clear. but the same screen shot when viewed in my Mac 
book again showed the same problem.

One more point is that I am using Xcode 3.2 in Snow Leopard (Version 
10.6.2) and in System Preference -> Appearence -> "Use LCD font 
smoothing when available" option if disabled , again font and text are 
displayed perfectly ie with out any distortion.
If I enable "Use LCD font smoothing when available" option which is 
enabled by default this problem again occurs. But this problem happens 
only with the application I have developed.

If any one can help me to resolve this issue using Cocoa it will be 
great help to all here developing Snow leopard applications.

regards
Pappan