I tried to remove ds.algorithms from my ignored tags by clicking on the popup "Remove ds.algorithms from Ignored Tags" link on the ds.algorithms page, and it didn't seem to work. Is this a bug? Is this my fault for using Google Chrome for OS X (version 7.0.517.41)? (It also doesn't work in Safari 5.0.2.)
I eventually figured out how to remove the tags by clicking on the X next to the tag on the list on the homepage.