We've received e-mail from several readers (and seen ourselves) that Yahoo mail seems to be experiencing some problems.  At this point, we don't know whether or not it is related to the DST changes, but today expect just about everything to be blamed on it.  We'll update the story if we get any real details.

Update: Some of our readers (and the author of this story) are now able to reach their Yahoo mail.  Still not sure what the problem was, but it has been unavailable pretty much all day.