If you are a regular reader of this blog, or almost any other blog covering the file format battle, then you have certainly come across comments from Stephane Rodriguez. He brings a unique perspective, knowing more about the legacy binary Excel formats than any sane person I know. So it a treat to have from Stephane a fuller exposition of some problems he ran into working with the Microsoft OOXML formats, in an technical article called Microsoft Office XML Formats? Defective by Design.
27 August Update: Slashdot has further coverage of Stephane’s article. Some good comments and perspectives can be read there.