Since yesterday afternoon (Feb 8 PST) the Blocks e-mail searcher has been
unavailable because of an unfortunate problem that occurred when some
systems software was upgraded. Anyone sending a request to blocks at howard.
fhcrc.org would have received a "mail loop error". Since requests were
never received by the server and logged, we cannot know who this affected.
However, the problem appears to have finally been tracked down and the
server has been back in operation since late this afternoon (Feb 9 PST).