Re: Upgrading to 1.1-beta breaks Atahualpa blog theme
You would need to add a line to the style.css of your Atahualpa theme, cross your fingers, and hope for the best. 
In style.css for Atahualpa, somewhere in the comments section where the theme name, author, and uri are, put…
Template: bp-sn-parent
That will tell WordPress to fall back on bp-sn-parent when Atahualpa doesn’t have files of its own to use. It’s still not a 100% fluid process, because the parent theme has its own CSS that it needs and uses to function and look the part. You can @import the style.css for bp-sn-parent and see if that helps at all too.
