Hi, I encountered the same problem. I do not know what caused this; but due to this problem software-properties-gtk failed to start. I upgraded etch->lenny a few months ago. There was definitely no other GNU/Linux distribution on this partition before that wasn't erased.
Removing the file solved the problem. It would be nice if either the root cause for this problem is no longer present so that people that upgrade now do not face this problem, or if the lsb-release preinst/postinst would delete this file if it contains exactly that, DISTRIB_ID="" Thanks for your attention, -- Jochem Berndsen | [EMAIL PROTECTED] GPG: 0xE6FABFAB -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]