Caching for css content for iphone FB APP

I'm trying to create a webpage for the iphone FB app wall link . When I try to use margin attribute on a div for the webpage, the margin attribute doesn't take affect when clicking on the wall link. If I view the same page in safari iphone browser the margin does take affect. It seems like it has to do with extra caching by Facebook of the CSS file. When I change the background color in the css file, the changes get propogated every开发者_JAVA百科where but inside the FB web browser on the iphone app.

found that FB wall post does some extra caching. to remove the caching, just pointed the css file to another file first, then switched it back after reloading the link from the wall post.