I started noticing this after upgrading to F29. It happens occasionally
and only when sending a message (I use Ctrl-Enter to send).
Right-click on window on the task bar and select close brings up the
force close dialog box and saying 'yes' it closes the Evolution main
'xkill' which I've come across helped with cleaning up the workspace:
omiday ~ $ xwininfo
xwininfo: Please select the window about which you
would like information by clicking the
mouse in that window.
xwininfo: Window id: 0x108e021 (has no name)
Absolute upper-left X: 176
Absolute upper-left Y: 50
Relative upper-left X: 176
Relative upper-left Y: 50
Visual Class: TrueColor
Border width: 0
Colormap: 0x20 (not installed)
Bit Gravity State: StaticGravity
Window Gravity State: StaticGravity
Backing Store State: NotUseful
Save Under State: no
Map State: IsViewable
Override Redirect State: no
Corners: +176+50 -463+50 -463-197 +176-197
omiday ~ $ xkill -id 0x108e021
xkill: killing creator of resource 0x108e021
The ghost window can be resized, and it would "remember" the contents of
a window from another workspace when I select it, switch to another
window in another workspace and return.
Anyone have similar issues?