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HeyPK
I never had problems with Equation Editor with Tiger, but, with Leopard, equations in Word or Power Point become corrupted. Delta signs frequently disappear or sometimes become an exclamation mark"!" A minus sign can become = or # or it simply disappears. Parentheses can become distorted or partially inverted. Frequently refreshing in Word by going a page up and then back can sometimes get the proper equation, but, more often than not, it is messed up. Building equations in text style reduces but does not eliminate the errors.