Just for the files: problem persistent (or rather: reappeared). When I hit "Reload" in my browser nothing happens; only when I reenter the URL. And when I reopen the browser it's stuck with the old version.
In the script I tried

$page = get 'http://...';
sleep 2;
$page = get 'http://...';
[download]

and it's working so far, but I don't know wheter it will continue to. If it doesn't, I'll post an update.
CombatSquirrel.