I am having an unusual problem. When a specific user prints out of her Outlook Web mail it causes the printer to basically crash with the error "Service error 900.00 RIP Software." Reading up on that error it tells me it's a problem with the communication of what's being sent. If this user tries to print to a different printer (Another Lexmark T640) it crashes that printer. If she prints from Word or any other application it prints fine.
What could be causing her internet e-mail printing to cause the printer to crash? This is a relatively new occurrence and it only appears to happen with this user.