Added appOS back in to prevent regressions. Since appOS is in the URL the cache should be different per OS, but UA guessing is still pointless and will be deprecated.

webtools/addons/public/htdocs/update.php

@@ -215,6 +215,16 @@ function get_os_id()
         'solaris'=>6
     );
 
+    // Check $_GET for a match.
+    if (!empty($_GET['appOS']) && ctype_alpha($_GET['appOS'])) {
+        $appOS = strtolower($_GET['appOS']);
+        foreach ($os as $string=>$id) {
+            if ($appOS == $string) {
+                return $id;
+            }
+        }
+    }
+
     // Check UA string for a match
     foreach ($os as $string=>$id) {
         if (preg_match("/^.*{$string}.*$/i",$_SERVER['HTTP_USER_AGENT'])) {