I'm running mine once an hour too. With the new code that ensures all possible replies are inserted at each batch, it's no longer necessary to stay 'ahead' of the newsgroup. (As long as you update more often than your expire date is set to

)
I've found some more bugs I'm afraid. The main one has to do with the regular expression parsing of the spam filters. I believe I've also fixed the problem Gilby brought up regarding forum generated posts. There was also a small issue that could cause posts to be displayed in the wrong order if a thread contained both usenet posts and forum posts.
The good news is they're all fixed and I've also added an auto purge function.
I'll release it as soon as I've done a bit more testing. In the meantime, if your regular expressions don't appear to work, don't worry, it's not a result of your regex skills.