Sure it is lower case.
I also suspect this might be a localization issue. Because in Turkish the lower case of I is ı and the lower case of İ is i.
Also it works fine when I start the program using the command line like this.
$ LC_ALL=C mypaint
I haven't tried with a tablet yet. But it seems removing "settings.json" in ~/mypaint folder seems to solve this problem.
Sure it is lower case.
I also suspect this might be a localization issue. Because in Turkish the lower case of I is ı and the lower case of İ is i.
Also it works fine when I start the program using the command line like this.
$ LC_ALL=C mypaint
I haven't tried with a tablet yet. But it seems removing "settings.json" in ~/mypaint folder seems to solve this problem.