Three Fragment Caching Questions

Hi,

I have three questions and would love answers to any of them:

1. Can I use fragment caching on a layout?

2. How can I expire fragments using script/runner. Code would be helpful here, I see hints online but none of it is complete.

3. When I enabled fragment caching in a web app there was a strange bug so that if users when to "site.com" everything worked fine, but if users went to "www.site.com" the layout was repeated twice around the dynamic content. The web server was lighttpd.

Again answers to any of these questions would be helpful.

-Scott