"xxxx equipped, but materia could not be restored"

Anyone else running into this? I'm getting an error message whenever I switch to a class with any melds at all - which is to say 11/12 of them. Reassigning the gear set fixes it (like what happens when you dye) but the message itself is making me a bit nervous.

The good news is that my materia seems right, from what I can tell. Although with some of these DoH classes it's tough to know for sure.