I've always run with 800x600 internal for the clones, and for a good while it's been perfect. I'd still get correct aspect ratio just by defining regions in maximizer. I remember a good while ago (probably 5-6 releases ago) there was the same aspect ratio problem as I see now, so you must have done something for the last release?

I'd keep it as it was in 1.8g. Dunno what your intentions were when changing it.

I'm also seeing more frequent crashes with 1.8h.