In my opinion, the .NET will be only working in filesystem where not most of it belongs to root (like it seems to be on ubuntu). During the installation of the .NET, the installer seems to be picking the config file of the distribution to know what is your printer settings, temporary directory etc. While this is probably meant with "the .NET is set to work on any o/s with any configuration" if it does happen that it does only read the file but writes on it - then you will have a problem for the coming months. my 2 c (and knowledge that without the directory check the .NET installation goes much further)
