Font alignment changes

I will line up a block of text with graphics/bullets, it looks perfect in my FLA but when I view it in my SWF, the text is out of alignment. When I go back to the FLA and it is out of alignment there too.

The only font I use is Sans and this usually happens when I have 2+ paragraphs of text that are separated by double returns.

I am working in Flash MX 2004, on a Mac running 10.4.8. My colleague has recently been having the same problems when he opens my files on his Windows PC.

For a while I thought it was a conflict w/ Extensis Suitcase, my font mgmt program, because it seemed to NOT happen when Suitcase was closed. But recently I noticed it happening sometimes even when Suitcase IS closed.

I think it may actually be a line spacing thing, not a font issue, but not sure exactly what the problem is, or how to fix it.

Does anyone have a fix to this???