When saving as a pdf in Illustrator CS3, the PDF OPTIONS box is missing, and the program locks up. If I hit ENTER (as if the options box was there), the file saves properly, and the program is unlocked. It appears that the OPTIONS box is hidden, but operational. Suggestions?
I'll assume you're working on a Windows system.
It's there, just off-screen.
Have you ever had a second monitor installed or worked at a different screen resolution?
Unfortunately, the PDF options dialog cannot be repositioned using normal methods (see http://forums.adobe.com/message/2465666#2465666). Position information is buried deep in the Windows registry, so resetting prefs (and, possibly, even reinstalling Illustrator) won't help.
Can you temporarily switch to a higher resolution or attach a second monitor? Once you have the dialog visible, you can pull it into your primary monitor area. It should then stay there after you restore your setup.
Creating a new Windows user account and logging in as a new user might also solve the problem.