diff --git a/contrib/numeric_score/main.php b/contrib/numeric_score/main.php
old mode 100644
new mode 100755
index 124265d2..97c81bd8
--- a/contrib/numeric_score/main.php
+++ b/contrib/numeric_score/main.php
@@ -185,7 +185,7 @@ class NumericScore implements Extension {
 		}
 
 		if($event instanceof ImageDeletionEvent) {
-			$database->execute("DELETE FROM numeric_score_votes WHERE image_id=?", array($event->image->id));
+			$database->execute("DELETE FROM numeric_score_votes WHERE image_id=:id", array("id" => $event->image->id));
 		}
 
 		if($event instanceof ParseLinkTemplateEvent) {
@@ -239,8 +239,8 @@ class NumericScore implements Extension {
 		global $config;
 
 		if($config->get_int("ext_numeric_score_version") < 1) {
-			$database->Execute("ALTER TABLE images ADD COLUMN numeric_score INTEGER NOT NULL DEFAULT 0");
-			$database->Execute("CREATE INDEX images__numeric_score ON images(numeric_score)");
+			$database->execute("ALTER TABLE images ADD COLUMN numeric_score INTEGER NOT NULL DEFAULT 0");
+			$database->execute("CREATE INDEX images__numeric_score ON images(numeric_score)");
 			$database->create_table("numeric_score_votes", "
 				image_id INTEGER NOT NULL,
 				user_id INTEGER NOT NULL,
@@ -253,24 +253,24 @@ class NumericScore implements Extension {
 			$config->set_int("ext_numeric_score_version", 1);
 		}
 		if($config->get_int("ext_numeric_score_version") < 2) {
-			$database->Execute("CREATE INDEX numeric_score_votes__user_votes ON numeric_score_votes(user_id, score)");
+			$database->execute("CREATE INDEX numeric_score_votes__user_votes ON numeric_score_votes(user_id, score)");
 			$config->set_int("ext_numeric_score_version", 2);
 		}
 	}
 
 	private function add_vote($image_id, $user_id, $score) {
 		global $database;
-		$database->Execute(
-			"DELETE FROM numeric_score_votes WHERE image_id=? AND user_id=?",
-			array($image_id, $user_id));
+		$database->execute(
+			"DELETE FROM numeric_score_votes WHERE image_id=:imageid AND user_id=:userid",
+			array("imageid" => $image_id, "userid" => $user_id));
 		if($score != 0) {
-			$database->Execute(
-				"INSERT INTO numeric_score_votes(image_id, user_id, score) VALUES(?, ?, ?)",
-				array($image_id, $user_id, $score));
+			$database->execute(
+				"INSERT INTO numeric_score_votes(image_id, user_id, score) VALUES(:imageid, :userid, :score)",
+				array("imageid" => $image_id, "userid" => $user_id, "score" => $score));
 		}
 		$database->Execute(
-			"UPDATE images SET numeric_score=(SELECT SUM(score) FROM numeric_score_votes WHERE image_id=?) WHERE id=?",
-			array($image_id, $image_id));
+			"UPDATE images SET numeric_score=(SELECT SUM(score) FROM numeric_score_votes WHERE image_id=:imageid) WHERE id=:id",
+			array("imageid" => $image_id, "id" => $image_id));
 	}
 }
 ?>
diff --git a/contrib/pm/main.php b/contrib/pm/main.php
old mode 100644
new mode 100755
index f8599057..e0190f1a
--- a/contrib/pm/main.php
+++ b/contrib/pm/main.php
@@ -93,13 +93,13 @@ class PrivMsg extends SimpleExtension {
 				switch($event->get_arg(0)) {
 					case "read":
 						$pm_id = int_escape($event->get_arg(1));
-						$pm = $database->get_row("SELECT * FROM private_message WHERE id = ?", array($pm_id));
+						$pm = $database->get_row("SELECT * FROM private_message WHERE id = :id", array("id" => $pm_id));
 						if(is_null($pm)) {
 							$this->theme->display_error($page, "No such PM", "There is no PM #$pm_id");
 						}
 						else if(($pm["to_id"] == $user->id) || $user->is_admin()) {
 							$from_user = User::by_id(int_escape($pm["from_id"]));
-							$database->get_row("UPDATE private_message SET is_read='Y' WHERE id = ?", array($pm_id));
+							$database->get_row("UPDATE private_message SET is_read='Y' WHERE id = :id", array("id" => $pm_id));
 							$this->theme->display_message($page, $from_user, $user, new PM($pm));
 						}
 						else {
@@ -109,12 +109,12 @@ class PrivMsg extends SimpleExtension {
 					case "delete":
 						if($user->check_auth_token()) {
 							$pm_id = int_escape($_POST["pm_id"]);
-							$pm = $database->get_row("SELECT * FROM private_message WHERE id = ?", array($pm_id));
+							$pm = $database->get_row("SELECT * FROM private_message WHERE id = :id", array("id" => $pm_id));
 							if(is_null($pm)) {
 								$this->theme->display_error($page, "No such PM", "There is no PM #$pm_id");
 							}
 							else if(($pm["to_id"] == $user->id) || $user->is_admin()) {
-								$database->execute("DELETE FROM private_message WHERE id = ?", array($pm_id));
+								$database->execute("DELETE FROM private_message WHERE id = :id", array("id" => $pm_id));
 								log_info("pm", "Deleted PM #$pm_id");
 								$page->set_mode("redirect");
 								$page->set_redirect($_SERVER["HTTP_REFERER"]);
@@ -146,9 +146,9 @@ class PrivMsg extends SimpleExtension {
 				INSERT INTO private_message(
 					from_id, from_ip, to_id,
 					sent_date, subject, message)
-				VALUES(?, ?, ?, now(), ?, ?)",
-			array($event->pm->from_id, $event->pm->from_ip,
-			$event->pm->to_id, $event->pm->subject, $event->pm->message)
+				VALUES(:fromid, :fromip, :toid, now(), :subject, :message)",
+			array("fromid" => $event->pm->from_id, "fromip" => $event->pm->from_ip,
+			"toid" => $event->pm->to_id, "subject" => $event->pm->subject, "message" => $event->pm->message)
 		);
 		log_info("pm", "Sent PM to User #{$event->pm->to_id}");
 	}
@@ -158,11 +158,11 @@ class PrivMsg extends SimpleExtension {
 		global $database;
 
 		$arr = $database->get_all("
-			SELECT private_message.*,user_from.name AS from_name
-			FROM private_message
-			JOIN users AS user_from ON user_from.id=from_id
-			WHERE to_id = ?
-			", array($user->id));
+				SELECT private_message.*,user_from.name AS from_name
+				FROM private_message
+				JOIN users AS user_from ON user_from.id=from_id
+				WHERE to_id = :toid", 
+			array("toid" => $user->id));
 		$pms = array();
 		foreach($arr as $pm) {
 			$pms[] = new PM($pm);
diff --git a/ext/alias_editor/main.php b/ext/alias_editor/main.php
old mode 100644
new mode 100755
index 88e22433..8986ac0b
--- a/ext/alias_editor/main.php
+++ b/ext/alias_editor/main.php
@@ -45,7 +45,7 @@ class AliasEditor extends SimpleExtension {
 			else if($event->get_arg(0) == "remove") {
 				if($user->is_admin()) {
 					if(isset($_POST['oldtag'])) {
-						$database->Execute("DELETE FROM aliases WHERE oldtag=?", array($_POST['oldtag']));
+						$database->execute("DELETE FROM aliases WHERE oldtag=:oldtag", array("oldtag" => $_POST['oldtag']));
 						log_info("alias_editor", "Deleted alias for ".$_POST['oldtag']);
 
 						$page->set_mode("redirect");
@@ -103,12 +103,12 @@ class AliasEditor extends SimpleExtension {
 
 	public function onAddAlias(AddAliasEvent $event) {
 		global $database;
-		$pair = array($event->oldtag, $event->newtag);
-		if($database->get_row("SELECT * FROM aliases WHERE oldtag=? AND lower(newtag)=lower(?)", $pair)) {
+		$pair = array("oldtag" => $event->oldtag, "newtag" => $event->newtag);
+		if($database->get_row("SELECT * FROM aliases WHERE oldtag=:oldtag AND lower(newtag)=lower(:newtag)", $pair)) {
 			throw new AddAliasException("That alias already exists");
 		}
 		else {
-			$database->Execute("INSERT INTO aliases(oldtag, newtag) VALUES(?, ?)", $pair);
+			$database->execute("INSERT INTO aliases(oldtag, newtag) VALUES(:oldtag, :newtag)", $pair);
 			log_info("alias_editor", "Added alias for {$event->oldtag} -> {$event->newtag}");
 		}
 	}
@@ -134,7 +134,7 @@ class AliasEditor extends SimpleExtension {
 		foreach(explode("\n", $csv) as $line) {
 			$parts = explode(",", $line);
 			if(count($parts) == 2) {
-				$database->execute("INSERT INTO aliases(oldtag, newtag) VALUES(?, ?)", $parts);
+				$database->execute("INSERT INTO aliases(oldtag, newtag) VALUES(:oldtag, :newtag)", array("oldtag" => $parts[0], "newtag" => $parts[1]);
 			}
 		}
 	}