When viewing the latest update in the zenphoto.org news feed (the feed at http://www.zenphoto.org/category/News/feed/) I found the title full of spammy stuff. It looks like the feed's been hacked again. The spammy stuff only shows up if you grab it as if you're a search bot.
To verify, try grabbing the feed as if you're the google bot:
wget --user-agent="Googlebot/2.1 (+http://www.google.com/bot.html)" http://www.zenphoto.org/category/News/feed/
...and you'll seesome pretty spammy stuff in the title tags, for example, replacing the real titles.
Just thought I should let someone know!