I know this has been discussed here once before. But, I just noticed that the circumflex of h-circumflex in Adobe's Minion Pro family is misplaced. It is aligned over the left stem; it should be aligned over the center of the entire letter, which means it may also need to be raised a bit, as well. As far as I know, Esperanto is the only language that uses this letter. I print Esperanto text quite frequently, and Minion Pro is the font I prefer to use. However, h-circumflex is by far the least used letter in Esperanto, so it's only while adding an OT feature to better support the language (for my own use, of course) that I happened to notice the misplaced circumflex.