You can to a get info (Command + I) on each font by highlighting it first. It will show you info as to where it is located and what kind and version it might be.
[attachment=2004:3.jpg] [attachment=2005:4.jpg]
Often you will have one in the main library for the system and one in your user font folder. Notice in the above example that one is a newer version so I probably would keep that one and disable the other. Actually, unless a font is corrupted, it really isn't all that critically bad if you have duplicates. Mainly saving hard drive space, RAM usage and clutter is the reason to remove duplicates.
If you are the only one using the computer you don't have to be concerned that removing a font from the main library will make the font not available to other users. However there are some fonts that the system needs but Times is not one of them.
Geneva.dfont
Helvetica.dfont
HelveticaNeue.dfont
Keyboard.dfont
LastResort.dfont
LucidaGranda.dfont
Monaco.dfont
Since Leopard, you usually would get a warning if you try to remove a system font.
QUOTE
Microsoft has distributed Times New Roman with every copy of Microsoft Windows since version 3.1, and the typeface is used as the default in many applications for MS Windows, especially word processors and Web browsers.
Linotype's Times Roman is the default Apple Mac OS X font for serif/roman generic font family. Monotype's Times New Roman is installed by default in latest versions of Mac OS X (e.g. 10.4).
Try checking the duplicates one by one and see where they are and validate them. If the only thing that fails is the fact that they are a duplicate you can just disable one and see if it has anything to do with the printing. It can be reenabled.
It may take some experimenting to see if AW will print properly. Do check for any printer updates, though.
Here is an interesting page from Adobe about fonts in OSX:
http://kb2.adobe.com/cps/327/327791.html