Index: bb-admin/plugins.php
===================================================================
--- bb-admin/plugins.php	(revision 802)
+++ bb-admin/plugins.php	(working copy)
@@ -13,7 +13,7 @@
 	}
 
 if ( isset($_GET['action']) ) {
-	$plugin = stripslashes(trim($_GET['plugin']));
+	$plugin = trim(urldecode($_GET['plugin']));
 	if ('activate' == $_GET['action']) {
 		bb_check_admin_referer( 'activate-plugin_' . $plugin );
 		if ( !in_array($plugin, array_keys($plugins)) )
Index: bb-admin/themes.php
===================================================================
--- bb-admin/themes.php	(revision 802)
+++ bb-admin/themes.php	(working copy)
@@ -7,7 +7,7 @@
 		exit;
 	}
 	bb_check_admin_referer( 'switch-theme' );
-	$activetheme = stripslashes($_GET['theme']);
+	$activetheme = urldecode($_GET['theme']);
 	bb_update_option( 'bb_active_theme', $activetheme );
 	wp_redirect( bb_get_option( 'uri' ) . 'bb-admin/themes.php?activated' );
 	exit;