I have noticed strange tooltips showing up today too. If you figure out to make it happen in some smaller context that would be very helpful. <div> </div><div>Robby On Tuesday, March 17, 2015, Alexander D. Knauth <<a href="mailto:alexander@knauth.org">alexander@knauth.org</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I’m not sure how to reliably reproduce it, but right now I have my-unpossible/main.rkt open in DrRacket, and strange type tooltips are appearing. my-unpossible/main.rkt is an untyped module, though it requires some typed modules. For example if I hover over line 8, column 1 (blank space) it shows the tooltip: (-> Real Integer) Integer And if I hover over line 8, columns 2-4, it shows: (-> Real Integer) If I hover over line 8, columns 5-6, it shows: (-> Pos (U Pos Dir) Pos (U Pos Dir) [#:normalize? Boolean] Affine) (-> Real Integer) And so on. If I close the window and open it again, they’re still there. When I quit DrRacket and restart it, they’re still there. And when I delete the compiled directory within the utils subdir, they’re still there. But I can’t seem to reproduce it with a simpler example. ____________________ Racket Users list: <a href="http://lists.racket-lang.org/users" target="_blank">http://lists.racket-lang.org/users</a> </blockquote></div>