With respect to the last few day's builds for Board 3.3.0 and Content 2.3.0 Alphas/Betas....
They're archived with the wrong permission levels for use with suphp, with Directories being 775 and Files being 664. And it throws a 500 error until they're recursively changed.
Those should be 755/644 for suphp, and that way in any case, I believe.