All,
Had a very curious event occur today.

Selected Worksheet_Change event macro on a sheet and put
breakoint on its title line.

Added a Watch expression for Application.EnableEvents, All
procedures, All modules.

Made a change on the sheet (using a cell with Validation).

Result:
EXCEL VANISHED! No errors, no warning, nothing.
I am not dreaming - this is repeatable!

Have done a Google serach and a MS KB search with no hits.
Any thoughts from the MVP community?
(besides of course, DON'T DO THAT!)

Thanks for you help,
Bewildered (Alex J)