planetplanet running on newsdot exploded when cph switched to atom 1.0. This is a shame, as atom seems to be a much better-thought-out syndication format than RSS.

I applied one patch I found floating around the web which improves the situation, a bit at least: it still needs to escape the encoded HTML for the output. The problem is actually in Mark Pilgrim's feed parser code, which I understand is unmaintained these days.