I use the Kubrick theme; the clean and simple design is a great layout for my blogs, which include lots of artwork. It's perfect except that (since you asked) it would be a huge help to not lose the sidebar when a visitor clicks on an individual post. Many of my visitors come from other sites that have linked to me, and when those sites link to an individual post, my visitors often don't spot the sidebar, where there's info I need for them to see. I've been considering switching to wordpress.org in order to have the flexibility to remedy this, but it seems like an overly involved solution to a fairly simple issue.
Thanks!