I have a menu AddToMenu Apps "Applications" Title + "XTerm" Exec exec xterm + "Rxvt" Exec exec rxvt [...] When I press the button to make the menu appear and release it over XTerm, xterm is not always started. This issue occurs on my two machines.
I am unable to reproduce this in fvwm3 (didn't test with fvwm). Are you able to reproduce this issue with fvwm3? if so file a bug with that package (though it will get more traction if you file an issue on github[^1] since this isn't about the Debian package). With fvwm version 2 no longer being developed non RC bugs will not be fixed. I will keep fvwm around for users who don't want to move to fvwm3, but only RC bugs will be dealt with. jaimos [^1]: https://github.com/fvwmorg/fvwm3/issues
I have not upgraded yet, and I don't think that my current config is compatible with fvwm3 as FvwmM4 seems no longer present (I'd like to get rid of m4 anyway, which I started to use in 2000).