I'm not really sure what happened, but my computer started reporting no space left on root...I checked, and ls shows /lost+found as taking up a whole lot of space...but if i cd to that directory, ls -a returns absolutely nothing. what's going on?

Maybe try ls -a and see if there are any hidden files?

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I tried that. it still lists nothing aside from . and ..

Not sure what you are seeing that leads you to believe that lost+found is "taking up a whole lot of space" then. Check tjc's tips in http://mysettopbox.tv/phpBB2/viewtopic.php?t=14382 for ways to determine where the culprit(s) may be (I would be looking in the /var/log directory structure first myself).

maybe I was reading the output incorrectly, because I found some other files that were taking up a lot of space, deleted them, and now everything works fine...sorry about that...