Well, if there's one thing I like to do, I like to check out all my favourite threads. Whether it be a DCC, a certain discussion topic, or a progressing hack, I just like to check them. One thing that annoys me though, is the fact that these threads don't tell me when new posts are available or something like that. Well, immediately they do, but when I'm asleep and these posts happens, there is no form of notification (aside email, which I opted out) that tells me if there are any new posts since the last time I saw it.
Here's what I want to suggest. I know that those threads with new posts in them are bolded until you've read the latest posts, but what I suggest, is that those threads which you have subscribed to stay bolded until you have read them, instead of being not bolded after a certain amount of time.
You can always check them in your User CP. It should load a list of your subscribed threads that have recent posts in them. If you know when you last posted, you can know at a glance from the list if you're up to date.
Your actual suggestion would involve some playing around with the code, I'm pretty sure, which isn't always an option.