AM p139 (right column, under T:Inscription) and p141 (Runic Magic and Creo Spells text box): Clarify the Arcane Connection requirement for runic Creo spells; as written, making a flaming sword with CrIg runes appears to require building a uniquely identifiable fire of the exact strength required, fixing an arcane connection to that specific fire, somehow incorporating the arcane connection into the inscription, and then putting the fire out and never lighting it again. (It also necessarily means that you can have a valid arcane connection to things that don't exist, which is...interesting.) This means that hastily scribbling flaming runes on your grogs' swords when you get a premonition of an ambush doesn't work, which feels like a bit of a shame. The example in the text box also appears to treat a cloth as an arcane connection to a feast that was laid out on it once, which seems sus.
See previous discussion of the issue here.
~ ~ ~
AM p140, center column:
Hermetic Rune Magic has two major drawbacks. Firstly, the runes are a lasting Arcane Connection to the caster, and beyond that they function in a manner similar to the spell Opening the Intangible Tunnel (ReVi Gen), in that other magi can target the caster by targeting the runes. That is, a rival magus could cast a Touch spell at the caster simply by touching the runes, as if he were touching the caster.
The level of the Intangible Tunnel effect (and thus, the cap on what level spell can be transmitted through it) is not stated anywhere. Edit: on rereading, it appears the intent was for there to be no cap. Could still stand to be clarified, methinks.