While installing sf-active from CVS (checked out yesterday) following the guide at
http://docs.indymedia.org/view/Devel/ActiveSfInstalling98#8_Setting_up_the_website  I came across this:

$ php ~/sf-active/sitename/scripts/cli_all_includes.php

Warning: in_array(): Wrong datatype for second argument in /home/sfa/sf-active/shared/classes/producer_class.inc on
line 487

This message is echoed 12 times in a row.

producer_class.inc, line 487, is:
if($check && in_array($check, $GLOBALS['build_sites'])){

So $GLOBALS['build_sites'] is no array.