Good catch, Masamune! The Character Stat window now marks your stats in red while a buff is boosting them, the way the old client did — e.g. WEAPON DEF reads 253 (153+100). It covers Attack, Weapon DEF, Magic, Magic DEF, Accuracy and Avoidability, and a buff that lowers a stat shows in blue. Refresh the game, open the stat window, click DETAIL and cast a buff to see it.