WP 3.0.1 and Atahualpa

So I upgrade to WP 3.0.1 using Atahualpa and cannot edit pages. Page, edit, left menu but no text, no nothing. Bad. Have to hold off upgrading all the other blogs. Upgrade Atahualpa to 3.5.3. No good. After weeks of search, found this post which sez PHP4 does not cut...