You mean it works fine if you go to Spark menu in main window and press Exit, but it doesnt work fine when you right click systray icon and select Exit? Strange then. As you say you press close, i just want to be sure. When you right click Spark’s systray icon (i believe we are talking about this) what context menu do you see?
If you press Exit in this menu, Spark is turning off, but icon does not dissapear until you hover it?
As i said, this can happen to any program. If program is freezing and you kill it in processes, Windows taskbar would still show its icon, until you hover systray. Like refresh issue. Maybe Spark is freezing for you on exit. What can you say about the machine? CPU, RAM? At work i have slower PC with less RAM and Spark is freezing time to time, so i have to kill its process, and then its icon doesnt dissapear until i hover it. But when Spark is running normally i can exit it via context menu and icon would dissapear.