Why fonts in IOS 5 not displaying as bold as they are in IOS 4?

I am building an application which is IOS 5 compatable...I am able to开发者_如何学Go resolve all compatability issues expect the fonts...the fonts are not looking as bold as they are in IOS4...Thanks in advance for any help..

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I am noticing the same thing, my vision isn't what it used to be and I thought it was due to fatigue but I too last night observed the same thing..... akin to lowering the contrast and sharpness on a LCD screen.

any fixes?