Welcome to WebmasterWorld Guest from 188.8.131.52
"Robozilla, our automated link checker, has just completed a run of the directory and has flagged up any addresses which are not working. Due to the growth of the directory in recent months and the long gap between this and the previous run, more errors were found than usual."
This was on 4-14, so maybe you caught them just after the culling?
If you want to report the changed links, head over to the official ODP forum and use the apropriate thread or use the "Update URL" feature to request removal for every link. be sure to include a reason we can validate.