This is most unusual. I think those who can help you will want more information. For starts
- Which version Ubuntu,
- what desktop environment/window manager, and
- what make/model computer?
You could try installing a different desktop environment (XFCE, Fluxbox, KDE), choosing it at time of logon (see the "session" menu"), and seeing if the problem occurs with it also. That would indicate whether it was local to a particular environment or computer-wide.
Also, is that chocolate company in Lititz still in business? They made great chocolate.