I bought InstaPress two days ago, and I couldn't make it working on my brand new WordPress blog. This happenned when I tried to add the first sidebar. After I saved the change, when I refresh the home page it would show nothing (just like an empty blog). You can see it on http://ganagus.com.
I have contacted the developers via the contact page yesterday, but so far there is no response. I'm writing this problem here hoping that someone already went throught the same path and know the solution.