I don\'t know about 3.1.3, but 3.10 is certainly available in a CF image, I don\'t knwo why they wouldn\'t be know, of course, I don\'t know hwy the lazy bastards wouldn\'t take the whopping 10 minutes to compile their modified qtopia to work with linux, there\'s allready a linux version and it a damn linux pda, but what do I know.
In any case, you could go back to 3.10 and then once you have sync working again, you can update to 3.13 with the windows installer if there realy isn\'t a CF image for it.