Originally uploaded by Jette_chan.
I’ve followed the sugesstion via feedburner support team:
Your feed has an invalid character(s) in it. This may be caused by editing your posts with a wordprocessing program. Try copying your posts into a plain text editor (like Notepad or TextEdit) before pasting them in your blogging tool.
But it seems no use. I’ve just wrote to feedburner support team again. And I wish I can got an better reply.