A couple of people now confirmed the problem with the ACS journal RSS feeds. Being back behind my desktop machine, I can post the obligatory screenshot:

The feed for Chemical Biology shows 79 feed items and the first one was a Environ. Sci. Technol. paper. The first of the 108 papers listed in the feed for Molecular Pharmaceutics is a perp from J.Phys.Chem.C.

This post was originally posted as https://chem-bla-ics.blogspot.com/2007/09/re-acs-rss-feeds-are-messed-up.html.