Is there another reason for Romney's odd gaffes in the UK?

A reader had written to me about this a few weeks ago, but I didn't write about it. Joan Walsh just has.

But could it be more than entitlement and an odd personal style? I’ve found myself wondering over the course of the campaign whether Romney has some kind of personality disorder, so dissociated does he occasionally seem from the well-worn routines of normal human interaction. Maybe we should be asking to see his medical records and not just his tax returns. I don’t mean to be flippant about that or insensitive to any kind of problem he may struggle with. But his struggles are our struggles; he’s running to be our president. There is something very odd about Mitt Romney.

No need to be nice about it. He's Looneytunes.