Created attachment 7339 screenshot It happened all the time since I started using scaling, and recent update didn't fix it like I was hoping it would. Not sure if it's not a global bug (like in panel or one of the libs), but it only happens with two plugins. Icon appears to be twice the panel size (see screenshot). I have scaling set up with following settings: $ env | grep SCALE\\\|RATIO GDK_SCALE=2 GDK_DPI_SCALE=0.5 QT_DEVICE_PIXEL_RATIO=2 and 192 DPI. Versions: xfce4-pulseaudio-plugin/zesty,now 0.3.1-1~17.04 amd64 [installed] xfce4-panel/zesty,now 4.12.1-1ubuntu1 amd64 [installed] libxfce4panel-2.0-4/zesty,now 4.12.1-1ubuntu1 amd64 [installed] libxfce4ui-1-0/zesty,now 4.13.1-1ubuntu1 amd64 [installed] libxfce4ui-2-0/zesty,now 4.13.1-1ubuntu1 amd64 [installed] libxfce4ui-common/zesty,zesty,now 4.13.1-1ubuntu1 all [installed] libxfce4ui-utils/zesty,now 4.13.1-1ubuntu1 amd64 [installed] libxfce4util-bin/zesty,now 4.13.1-0ppa1~17.04 amd64 [installed] libxfce4util-common/zesty,zesty,now 4.13.1-0ppa1~17.04 all [installed] libxfce4util7/zesty,now 4.13.1-0ppa1~17.04 amd64 [installed] Packages are from Xfce4 Ubuntu PPAs (zesty/17.04). Might or might not be related to this whiskers bug https://bugzilla.xfce.org/show_bug.cgi?id=13893
This is how they fixed a similar bug in wiskers: https://git.xfce.org/panel-plugins/xfce4-whiskermenu-plugin/commit?id=e9944243454b39e9e50f5d64e0599e8306bba52f hope it helps.
Sean Davis referenced this bugreport in commit 7c2e79ae34488c03518409651aa866614e056fbe Fix panel icon too big with high DPI (bug #13894) https://git.xfce.org/panel-plugins/xfce4-pulseaudio-plugin/commit?id=7c2e79ae34488c03518409651aa866614e056fbe
Thanks for the bug report and link to related fix. This has been adapted and applied in the above commit. Thanks!