A student at the University of Washington at Tacoma says she was forced to withdraw because the university changed the way it dealt with her severe nut allergy, ABC News reported. The student said that, last year, the university posted "peanut/nut-free classroom" signs on classrooms she used. But this year, the university didn't use the signs but said it would send a letter to all students in the classes asking them not to bring nuts. The student says this approach is not sufficient. But the university says that it can't assure the absence of nuts, and was trying to take reasonable steps to minimize the risk.