No problem, glad you and others like it..
One thing I have added on other forums is:
On the bottom/top of a thread you get Reply, Notify, Mark unread, Send this topic and print.. buttons.
Would you like an "Active Topic" button, It's the same as "Show unread posts since last visit", just saves you having to scroll up after each thread you read, often changed the "Show unread posts since last visit." to "Show Active Topics" ??