It came to my attention recently that some XML output (ASX files) is not working on the Mac platform. Asx is the Windows Media playlist file format. I am using the XmlTextWriter object to output to a text file, and these files are located on a webserver so people can click on them and listen to pretty music. Unfortunately these files don't work on the mac because it chokes on the BOM. Removing the BOM fixed the issue. Yay, I'm happy and so is the client. Unfortunately I'm left feeling like I shouldn't...