That isn't entirely accurate.
Everyone can see the fireball detonate. But they didn't necessarily see that it was YOU that cast it.
Now it will be pretty obvious who the caster is.
Well, the fire originates from your body, so if anyone was looking your way when you cast, they can probably connect the dots.
Indirect spells don't just explode at the target.
But true, in a lot of cases it is an actual disadvantage. Just not necessarily this time.
@Slash: Certainly interesting questions. More importantly: Is Sunlight radiation? There's an anti-infected spell using that. For "The Laser-Mage". Though that's really not Errata anymore. ^^For some actual (possible) Errata:
"Spectral Warden" has [Hermetic] listed as an associated tradition, which for fluff works just fine, I suppose, but the previously listed rules said that a related tradition has it's requirements reduced by 2, and it has no requirements I can make out.
Edit: Does Berserker Temper have any advantages? So far, it looks like a free negative quality that even suppresses the most likely power to go with it.
Or is the mention of masks supposed to be it's benefit? Get a mentors mask only when going berserk?
Edit2: What kind of damage is "Earth" anyways?