"Unknown architecture" with iPhone development

Every now and again I get "Unknown architecture" when trying to compile. I found this post that has the solution in the bottom: *

From the "Project" menu, choose Edit Active Target " ". Select the "Build" tab. In the search box, look for FRAMEWORK_SEARCH_PATH. Highlight the row with a search path in it. Press to completely wipe out the path.

I don't know quite why there sometimes are more paths there that I don't want, but it helps anyways.