Andy Wingo agreed on IRC to accepting UTC, since we've since discovered that not only various web servers, but also some transparent web proxies put UTC in the date header, which was causing problems for many people.
So, I've pushed a change to stable-2.0 to accept UTC. http://git.savannah.gnu.org/gitweb/?p=guile.git;a=commit;h=8904b7a9362ede0de324e55701d8ea1d018f8738 I'm closing this bug now. Thanks for the report! Mark
