I have recently started a new play through of Oblivion and have been seeing this crash happen every time I level up. I have the most recent version of Oblivion XP installed. I believe it is Dynamic Leveled List that is causing the issue. Whenever I uncheck the Dynamic Leveled List.esp, the done button works and I can level up. I have not found any fixes for this so far. Please see the attached crash dump report.