HP Jornada 680 Palmtop - Font Problem

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When one loads a new font to the Jornada's Windows CE directory(say Comic Sans), the system works fine. But after pressing the soft formating button to solve a hang, as is necessary form time to time, the problem occurs. When opening the HP Settings window (and others), the window content overflows it's frame and is unreadable. Only way to solve is to uninstall font.... soft format again.... reinstall font. All will be OK until next soft format.
Any ideas ??