Aha, good solution. Thanks.
I think this link might work better for me:
http://www.emaildiscussions.com/subscription.php (ie listing threads rather than subscribed forums).
But I'll try both of them over the next few days and see how I go.
No, I retract that. Just realised that my link is only listing threads that I've subscribed to (usually be contributing something). Should have interpreted the name of the list ('Subscribed Threads') more carefully and checked before I wrote.