Actually the leaveless branches were caused by not knowing temperatures would get up to 38 C on the day I left it outside and went out. Almost all the leaves blackened and fell off and for a little while I didn't think we'd save it.
Looking at the photos, I don't see the white pimples I spoke of, but that's what they look like. Groups of three or four in a line following the edge of the leaf.
The first photo does clearly show the crumpled leaves though, right in the middle.