Possible Bug In CS4?

I opened one of my projects which was built in CS3 and when I saved it in CS4 and published, I was shocked to see the whole text fields are missing! then I found out that in CS4 the font, "Tahoma" does not have any Italic style! and also the IDE itself had turned all my "regular" styles to "bold" and in result, all embeding was missing...that's ok, but I just wonder why the Italic style for "Tahoma" is missing?! anyone else has this problem with Tahoma?