VLSU: Mapping the Limits of Joint Multimodal Understanding for AI Safety - Palaskar, Shruti; Gatys, Leon; Abdelrahman, Mona; Jacobo, Mar; Lindsey, Laurence; Moharir, Rutika; Lund, Gunnar; Xu, Yang; Shiee, Navid; Bigham, Jeffrey; Maalouf, Charles; Cheng, Joseph (International Conference on Learning Representations, 2026)