Browser cash was the issue. I tried to open this post by using its URL link before it publish. I was getting the same blank screen even after publishing it. Thanks Samuel for the reply. It works.
I checked in Safari and IE. I can see the post. I am using Firefox 3.6.6 in my computer and it is coming as black page. And it is only for one post. I am just wondering what is happening to this particular post with my Firefox. Anyway thanks for the help. So I am going to change the the status of this thread as resolved.