XMLRPC problem with MarsEdit and Qumana

Hi, i know the problem on wordpress 2.1 with (string) ‘catid’ but i use wordpress 2.1.2 (which has it resolved) but i cannnot use qumana or marsedit when i try to refresh topics or categories. I can write post, but without categories. It must be any error on xmlrpc.php
My blog is in spanish, maybe it can be the problem

Thanks a lot