http://bugs.winehq.org/show_bug.cgi?id=5264
--- Comment #25 from Rosanne DiMesio dimesio@earthlink.net 2009-02-04 20:53:55 --- Setting an override for usp10.dll in Word 2007 fixes the Equation Tools, not the Equation Editor. They are not the same thing. Equation Tools are opened by clicking Insert->Equation. The Equation Editor is opened by selecting Insert->Objects->Objects->Microsoft Equation Editor 3.0.
This bug is for the Equation Editor. It is still present in Office 2007 in 1.1.14.