Running Fedora 21 with Wayland 1.5.0 and xorg-x11-server-Xwayland-1.15.99.904-4.fc21.x86_64 . If I activate a Firefox window and then alt-tab out of it, it seems like the alt keypress itself is also interpreted - Firefox shows or hides its menu bar, like it would if I just pressed <alt> (in any Firefox release with the hidden menu bar). Something also seems to be sent to the window I switched to - if it's a GNOME terminal, I sometimes see an error "bash: words: bad array subscript" to reproduce, just log into a Shell-on-Wayland session in a current Fedora 21 and try alt-tabbing between a Firefox window and a GNOME terminal window, at least that dependably reproduces the bug for me.
oh, filed against Xwayland because I don't see this when switching between two native Wayland windows.
Mutter actually implements its entire own compositor setup - can you please file this as a bug there? Ta.
aha, thanks for the tip. Yup, I can.
For anyone else who winds up here, GNOME bug appears to be https://bugzilla.gnome.org/show_bug.cgi?id=727178 .
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.