Hurt during orienteering race on May 22. Definitely an issue with my orienteering shoes, which have zero forefoot cushioning and a spike right under the middle of my forefoot.
Subsided during the next week, but re-injured on May 29 in the Nipika Trail race.
Symptoms seem consistent with a stress fracture, though it could be bad bruising from my O shoes and then again from the rough trails.
As of June 13, seems to be much better. Ran quite a bit this week, though mostly short and/or easy runs.
Seems to have resolved itself around July 1. Didn't have any problem during the NAOC/Barebones orienteering events :-).