My enviromnment is:

Microsoft Word 2007 with PDF/XPS ADDin.
 The document is in a .doc 972003 compatible format
 the equation is in Microsoft Equation 3.0 format
When I save as the document in PDF there is a problem with brackets rendering.
Equations in word document:Shot at 20070729
Settings used for PDF plugin:Shot at 20070729
Resultant Equations in PDF document:Shot at 20070729
Instead I also noted that:
 the smaller brackets like (i,j) are printed correctly.
 if I use "free PDF CREATOR" the equations are rendered correctly,
but I don't want use it because it don't generates the browsable summary...
 finally if I convert the equation in "Mathtype 6.0 Equations" the brackets, that appear screwed in above pdf, completely disappear!
Help!!!