While word pad did add support for docx files in Windows 7, I wonder how good a viewer it is for viewing complex documents that have complex formatting applied.

While word pad did add support for docx files in Windows 7, I wonder how good a viewer it is for viewing complex documents that have complex formatting applied. I do not know but I suspect that the results may be less than stellar. I suspect the same is true for the other programs as well. I know MS published docx as an open spec but in my experience I find that only MS programs are able to maintain document fidelity in viewing the documents. When you use other viewers there is almost always something that looks a little off. Does anyone know why you don't have same viewing results for complex docx documents when viewed under different viewers ?