I noticed that ProjectPlace replaces certain file extensions. If I upload a *.csv file for example, ProjectPlace will rename it to *.csv.xls. In other words: ProjectPlace assumes that the *.csv file is linked to Excel and makes an Excel document from it. Something similar happens with other extensions.
In my opinion ProjectPlace should not change the file extensions. I think this is unwanted behaviour. If I rename a *.csv to *.jpg (for example), I would like ProjectPlace to maintain the *.jpg extension, because of it is my intention to rename it to *.jpg!