At various times while debugging Spinner event logic, sometimes by SET STEP ON and sometimes just sloppy coding causing an error there, the VFP Debugger will appear with some of its "areas" corrupted by wide black horizontal lines that sometimes cover parts of things and oter times all of a section.

I have observed them most in 2 places:
1) across part (left side to about middle) of the buttons immediately under the menu and immedisately above the Trace window top-panel.
2) Across the whole of the Watch top portion, including both the window top-panel itself and the portion below having the entry box labelled "Watch".

This occurs intermittently but regularly.

My video adapter is a Matrox G400 dual, using only one monitor at this time but with 2 connected) with a XP-approved driver.