Something Leonard Nimoy was very particular about was how his Vulcan ears were portrayed. Specifically that they had a gentle front point on the tips. But another thing about his ears were that they were glued back along his head.

When he first got fitted for the ears for The Motion Picture, Fred Phillips forgot he had to pin his ears back and, as described in the Making Of book, he looked like a "gremlin." Easily fixed though.

But that's something I'm noticing with the new new Trek series Vulcans. They don't pin their ears back. And everytime I see that, I think about that gremlin line in the book. :)