Could be a video driver problem.

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>It happens only on my workstation... sorry... was trying to make that obvious. Interestingly it will not happen on my workstation when I run the application from within a virtual box. I am convinced that it's not a ;Visual FoxPro form issue/setting, but a VFP-Windows interface issue. I just don't know enough about the VFP internals to know which Windows DLL, API, etc. is the problem.