Mark Pilgrim announced a RSS validator, and much to my chagrin my RSS feed didn’t validate because the date format was wrong (I omitted the time-of-day part, which is mandatory in RFC 2822). This after I had carefully investigated RFC-2822-format dates specifically only a few weeks later. I have now fixed this and my RSS feed validates.
My RSS 0.9x feed failed to validate
after my last entry—because I included an HTML 4
character entity in the title. (I used
— to create an em-dash.) This is OK for
HTML, but forbidden in RSS. I have fixed the script that
generates the file so it converts these entities in to the
corresponding Unicode character. Sorry for any inconvenience.