Fantastic, Scriptygoddess posts an updated ‘subscribe to comments’ plugin for WP1.5.
It’s installed here no worries and I’ve also fixed it up on IncSub blogs. The two best things about it are that syubscribers can now manage their subscriptions and there’s a little php function’ comment_subscription_status()’ which allow you to see who has and has not subscribed to the comments feeds. Ace!