After upgrading from 3.0.10 to 3.3.7 the view counter of topics and attachments increase by every page reload (F5).

I had a look at the code and I think I found the reason.

Line 2265 in viewtopic.php (3.3.7) checks for:

strpos($user->data['session_page'], '&t=' . $topic_id) === false

But a link to a forum looks like this:

viewforum.php?t=...

There is no forum id any more, so no & in the URL.

When viewing a post the same happens, the counters increase by every page refresh. This happens in 3.0 and 3.3.

viewforum.php?p=...

Changing the check in viewtopic.php to this will stop counting on page refresh, at least in the few experiments I did so far:

preg_match('/[\?&](t=' . $topic_id . '|p=' . $post_id . ')/', $user->data['session_page']) == 0