Puzzles in Hyperon, Charm and Beauty Physics
  Puzzles awaiting better experiments and better theory include: (1) the contradiction between good and bad SU(3) baryon wave functions in fitting Cabibbo theory for hyperon decays, strangeness suppression in the sea and the violation of the Gottfried Sum rule - no model fits all; (2) Anomalously enhanced Cabibbo-suppressed $D^+ \to K^{*+}(s\bar d)$ decays; (3) anomalously enhanced and suppressed $B \to \eta' X$ decays; (4) the OZI rule in weak decays; (5) Vector dominance ($W \to \pi, \rho, a_1, D_s, D^*_s $) in weak decays (6) Puzzles in doubly-cabibbo-suppressed charm decays.(7) Problems in obtaining $\Lambda$ spin structure from polarization measurements of produced $\Lambda$'s. 
Harry. J. Lipkin (Weizmann Institute, Tel Aviv University, Argonne)