Have seen that several times for Bard/Shieldman/related characters when they level up and start unlocking advanced spells. (Elemental Attack Spells)(Altarian race)

[Another funny detail I've noticed: (Not really a bug I dont think, but related) When Bard/Shieldman/related characters are placed in an army, "Shieldman's Army" or "Bard's Army" always makes me chuckle. Not sure if there is a way to rename them seeing as how they seem to be considered heroes, but it would be nice.]