https://bugs.winehq.org/show_bug.cgi?id=38409
--- Comment #29 from Alexey Min alexey.min@gmail.com --- Yep, plasma-5.5 has received a new feature called xembedsniproxy ( http://blog.davidedmundson.co.uk/blog/xembed_back ) but it is not perfect, see https://bugs.kde.org/show_bug.cgi?id=355684 or similar. Also read comments in code, for example in commit: https://quickgit.kde.org/?p=plasma-workspace.git&a=commitdiff&h=41df... especially one saying "a workaround for X11 bug: xembed icon may suddenly become transparent for a one or few frames." (which has no reliable workaround, AFAIK). There is also an interesting hack in that commit, to detect presence or absence of alpha channel, I guess I'll have to do similar thing. It's just new year holidays last for too long.