Multisite Default Blog (Plugin) not working as expected

Hi,

I am using wordpress multisite and default blog plugin. Whenever i create a new site from admin dashboard, the newly created blog is absolutely right but when i register a new site and user, content from some pages (which is copied from default blog) goes missing.

In my case, iframe and form inputs were disappeared alongwith their parent containers (used div,p,table but no use).

How can i fix this any ideas ??

Thanks