The latest 4e errata is up.

Of note to my group:

• Shadow Wasp Strike (Ranger Attack 3) now targets Reflex, not AC.
• Flaming Sphere has clearer text (see below)
• Brew Potion is now a 1st level ritual
• Stealth got changed (but you know that, don’t you!)

Flaming Sphere – Wizard Attack 3
Effect: You conjure a Medium flaming sphere that occupies a square within
range, and the sphere attacks. Any creature that starts its turn adjacent to the
sphere takes 1d4 + Intelligence modifier fire damage. As a move action, you
can move the sphere 6 squares.