In reply to owlart:
> Ahh, so maybe it's a "feature" rather than a "bug" then!
Not so much. Feedback from the UKC bods has been that it seems to happen when the site is being aggressively scraped by bots. From the site updates thread it looks like letting them know when it’s particularly bad has been helpful in allowing them to check the site logs and try to make some tweaks to prevent it.