A primary Boston-area subway station, the Alewife T stop, has undergone a drastic graphic redesign. I imagine they meant the best by adding color-coded parking lot designators, updated platform signs attempting to indicate which of several exit stairways to take, etc. But instead (in my humble opinion) they messed it up by going with a typeface like Eurostile instead of good ol' Helvetica. (I.e., think "NCC-1701" or "car dashboard" versus "American Airlines.")
Someone else has already invited the rants of many a blog-commenter, so I'll leave it at that. Here are the photos of the difficult-to-read new signs.