Hi moe,
I am not sure what the exact problem was here, without seeing an example, but I will say that pasting from MS Word is generally a very bad idea. Word often using special characters that don't work on the web, and may also include extraneous xml tags that can mess things up a bit. As such, creating post directly in the form is better, or you could use a plain text editor (such as notepad).
Note that basic html is accepted, such a links, img tags, bold, italics, etc., but other things will get stripped (such as javascript).
Hope this helps,
Mark