I'm a relative Flash newbie. I have CS4 on two Mac's. On one, I drop a combobox onto the stage and add some items to it, and it renders fine. On the other, I do the exact same thing, and I get the control with the proper number of dropdown slots, but no text. If I copy the SWF from the working machine to the non-working machine, it stops working. Likewise, the SWF authored on the non-working machine is fine when copied to the other machine.
The working machine has Leopard and no other Adobe products. The non-working machine has Snow Leopard and Photoshop CS4 on it as well.
This feels like a font problem, but the font mapper dialog doesn't show any fonts as missing and needing replacement. All of the other components I've tried (list and button) suffer the same problem.