custom UIButton image is getting reduced (shrinked) in iphone OS 4.0

I am facing very strange issue.

When I was running my app in iPhone OS 3.2 the image which i have set for custom UIButton was looking like : (see attached image.) But when i tried to run t开发者_如何学JAVAhe same project with iPhone OS 4.0 the image is changed.

alt text http://grab.by/5mes

alt text http://grab.by/5met

Can anybody figure it out, what 's the issue. I also tried to set background image instead of setImage. But result is same.

for 3.2 & before its looking fine but in 4.O the image is shrinked in the same custom button everywhere like the image i have attached.

???

can you check with images those you are setting to UIButtons. Please make sure images should not contains blank borders.