.numbers file extension
I doubt this is possible, but is there a way to get Numbers to not add the .numbers extension to filenames when exporting or printing as PDF? It's sometimes confusing to my clients to get a file called something like "finalcopy.numbers.pdf", so I always remove the middle extension, which is a pain. I don't see how it serves any purpose, anyway... no one cares what software the pdf was created in!
The same is true for Pages. Pretty annoying.