I have had a similar problem, copy/paste from Word into Flash CS3 (used to work
fine before I upgraded to Flash CS3 and Word 2008 for MAC). My solution, which
may you, copy/paste your Word doc into TextEdit, and use that as your new
source doc. (e.g. open original Word document, select-all, copy, paste into a
new TextEdit document, and use that new TextEdit document to copy/paste into
Flash and maybe your Dreamweaver). Works without any glitches for me. Just
requires the one extra step.