This is my first post here, so hello all :)

In function "blog_update_user_perms" in /inc/MODEL/collections/_blog.funcs.php is big memory leak.

Each loop

foreach( $DB->get_col( 'SELECT user_ID FROM T_users' ) as $loop_user_ID )

consume ~ 1.3 K of memory.
Directly this is caused by "param" function witch sets unused $GLOBALS[] values (14 each loop). Immediatly freeing it by "unset" helps, but this isn't elegant solution. The "param" function should be change because this problem probably exists in much more places.