For some time already CH used ini file placed on the copyhandler.com to get update information.
That format is problematic in conveying extended information like changelog or additional user-facing text. Also processing ini files using php is not as straightforward as xml files.
Need to change the server-side storage format for update information from ini to xml (ini need to stay for backward compatibility with pre-1.40).
Also, to limit transferred data, CH client need to send some data to the server (like OS, CH version, language).