Second Half

Can anyone make sense of why, when the file browser opens to attach a file to an email message in Apple Mail, there is a check-box asking if you wish to make your attachments "Windows Friendly"? See below.

I don't understand this at all. Is there any advantage to sending attachements that are NOT "windows friendly"? If anything, it's a complete and total annoyance and simply silly not to always send such attachments. What happens if you forget to check the box? I have at least one person that I send attachments to that cannot read the attachments I send unless I check this silly box. Again, why would this not be always set internally and NEVER presented as a choice?

I could find no preference setting that would let me set this to be true all the time.

Apple Mail has held up well for me. Its search serves me well and with add-ons like Mail Act-On and Textpander available, I find it quite efficient. But this one "windows friendly" thing has me completely baffled. Last I checked more than 90% of the systems out in the world today are "windows" systems.