I found some application with xpm icon will be display with too big icon in Application menu.
I've tried remove libxpm then reinstall but it's not fix.
How can I do with big XPM icon (defined in .desktop) on Application Menu
Why not convert the .xpm to another image format, like .svg?
I can't convert it to another format because a lot of application has owned .xpm icon file like crossover, rssowl... that's why I search the solution to fix it