Crash report about the accomplishments window when I click on one of my trophies

Whenever I try to open one of the trophies I won, I get a message saying the application crashed, and whether or no I want it restarted.
The window is not closed. If I ask to "restart the application", I get another accomplishment window opened, and both are usable - but none can display the trophy I selected.

Interestingly, when I click on a trophy from my "Opportunities" (locked or not), I can read its details... Only "my" accomplishments makes the error message appear.

When I click on the "show details" button in the crash report, I get some more information, notably:
"accomplishments-viewer crashed with UnicodeDecodeError in accomplishment_info(): 'ascii' codec can't decode byte 0xc3 in position 5 ordinal not in range(128)"

I have had this error multiple times from the beginning (0.1) and now with 0.2.
I always selected to "send this bug report", but I wanted to make sure the information was reaching you.