I get this error twice when following setup.php on a new ZP installation -- appears to be harmless, but would be much more user-friendly if it could be suppressed...

Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in C:xampplitehtdocsgalleryzp-coresetup.php on line 51

Fresh install of ZP 1.1.5, into a fresh install of XAMPP Lite 1.6.6a

This is fixed in the nightly builds.