Hello, 

I have problem with my editor (user has page_editor capability for few categories), when he tries to update page with no parents everything is fine, but if page has parent i get this error:

Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\HGK_MU\wp-content\plugins\role-scoper\query-interceptor_rs.php on line 914

Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\HGK_MU\wp-content\plugins\role-scoper\query-interceptor_rs.php on line 914

Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\HGK_MU\wp-content\plugins\role-scoper\query-interceptor_rs.php on line 914

Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\HGK_MU\wp-content\plugins\role-scoper\query-interceptor_rs.php on line 914

line 914 is: 

foreach ( $alternate_reqd_caps as $alternate_capset ) { 

I managed to find values of $alternate_reqd_caps that cause this error:

alternate_reqd_caps arg: s:18:"create_child_pages";

alternate_reqd_caps arg: s:18:"create_child_pages";

alternate_reqd_caps arg: s:18:"create_child_pages";

alternate_reqd_caps arg: s:18:"create_child_pages";

I fixed that by changing line 913 to:

if ( !empty($alternate_reqd_caps) && is_array($alternate_reqd_caps) ) {  

I'm using Role scoper 1.3.28 and wordpress 3.0.5

I havent found "alternate_reqd_caps" in theme folder neither  in plugins folder(except in role-scoper).  Btw original log was(not sure if order is correct, i just filtered ones that cause problems):

alternate_reqd_caps arg: s:18:"create_child_pages";

alternate_reqd_caps arg: a:1:{i:0;s:18:"create_child_pages";}

alternate_reqd_caps arg: a:1:{i:0;s:18:"create_child_pages";}

alternate_reqd_caps arg: s:18:"create_child_pages";

alternate_reqd_caps arg: a:1:{i:0;s:18:"create_child_pages";}

alternate_reqd_caps arg: s:18:"create_child_pages";

alternate_reqd_caps arg: a:1:{i:0;s:18:"create_child_pages";}

alternate_reqd_caps arg: s:18:"create_child_pages";