Thank you. If the answer to this is always "file a suggestion", then it might be wise to rephrase FAQ 151 <http://www.livejournal.com/support/faqbrowse.bml?faqid=151>:
"The feed must use a text encoding which LiveJournal recognizes. If the text encoding is invalid, then the syndicated account will not update. If you believe that the feed uses a valid encoding which LiveJournal does not recognize, please raise this issue by opening a support request in the syndication category."