The .dtsx files are absolutely abysmal for source control. Impossible to merge or get any idea of what was changed from version to version, so the only thing you can rely on are commit comments. MS could make this so much better by separating the code used to drive developer studio from the steps to minimize the changes to the files. Perhaps split the files into two or put all the horrible gobbledygook somewhere at the bottom? Right now they might as well be completely binary.