archive debs missing on US mirror

For years I have used rsync to maintain my debian archive mirror. Lately a number of unstable .debs, always the latest versions, seem to be missing from from debian/pool/main on ftp.debian.org, in spite of their md5sums appearing in the list at debian/indices/md5sums.gz. An example is

Re: archive debs missing on US mirror

Marty wrote: For years I have used rsync to maintain my debian archive mirror. Lately a number of unstable .debs, always the latest versions, seem to be missing from from debian/pool/main on ftp.debian.org, in spite of their md5sums appearing in the list at debian/indices/md5sums.gz. An