Edit Page Html- Text Formatting Problems

I'm trying to format text with the HTML editor and find that when I apply bold text style to section titles it seems to work in the editor but when previewing I found the bolding was not applied to any section headings except the first one. Is this a bug and is there a workaround? Thanks for any replies.

Same problem here so it's not just you, under general, appearance try changing the “Default wysiwyg editor” and see if one of the others works better - Sno