Because Japanese doesn't have spaces, I've noticed a lot of posters have had trouble bolding individual words in sentences (myself included). See this answer for an example: http://japanese.stackexchange.com/questions/329/passive-transitive-verb-vs-intransitive-verb-vs/640#640 (not to pick on istrasci).
One of the issues is that the bolding appears correct in the preview pane, but not in the actual post. For example,
学生は**日本語**を教わった appears as 学生は日本語を教わった in the preview pane but 学生は*日本語*を教わった in the actual post.
Is this a bug with the preview panel that should be fixed, or should we develop a workaround as a community?