Upgraded 2.0.9.2 to 2.0.10. Copied all html files (no mainfile.php), and click system upgrade. System return to admin page and showed 2.0.10 as version.

Going to any page outside of admin, I get the following with PHP Debug turned on: "PHP Fatal error: _compile_source(): Failed opening required '/pathToXoops/class/smarty/Smarty_Compiler.class.php' (include_Path='.:/pathToXoops/lib/php') in /opt/pathToXoops/class/smarty/Smarty.class.php on line 1443

Group other is readable to all paths, and line 1443 really doesn't mean anything to me. Any ideas? Reverting to backups....