https://bugs.winehq.org/show_bug.cgi?id=30421
--- Comment #5 from Luke Kenneth Casson Leighton lkcl@lkcl.net --- dmitri, thanks for responding. i'll have to ask the fvwm developers and get back to you, because they are more familiar with the issue (i am just an end-user with a clear repro case and a description of a long-standing known problem).