There is a new version V2.1.0 for DprojNormalizer available, which targets a problem when using option sets and/or build events. Thanks to Peter Sonderegger for bringing this to my attention.
Be aware that this version may change the sorting of your dproj files triggering a version control change. Well, it obviously does that – otherwise, what would it be good for?
The new version can be downloaded here: DprojNormalizer