What is this? [o:p][/o:p][/span]

I have no idea what those strings of HTML code do or mean (and I substituted [ for <), but they messed up my feed for the past couple days.

They got into my feed because I cut and pasted some text from microsoft entourage.

When I decided to figure out what was wrong with my feed, the clue was "did you edit your posts in MS Word?"

I learned a long time ago not to do that.

Now I know to avoid all Microsoft software when it comes to publishing on the web.