You can configure fonts for your Mathematica account using UNIX commands so that you can run Mathematica without receiving font errors.

1. Log into your Mathematica account.
2. Open a new file called ~/myxfsconfig  with your preferred text editor.
3. Make the contents of this file look exactly as shown below:
   
   #xfs configuration file for Mathematica Users
   #D. Sweet (taken from xfs man page)
   
   client-limit = 10
   clone-self = on
   catalogue
   = /afs/glue.umd.edu/software/mathematica/current/SystemFiles/Fonts/X
   
   
4. Close and Save the file.
5. Issue the next set of commands from the command prompt:
   
   xfs -config ~/myxfsconfig &
   xset +fp tcp/this.machine.umd.edu:7100 (substituting the host name of the machine that you are on)>
   xset +fp rehash
   tap mathematica
   mathematica &

You will need to use these commands each time that you want to use Mathematica.