You cannot save this document with extension at the end of the name

You cannot save this document with extension “.csv” at the end of the name. The required extension is “.txt”.
You can choose to use both, so that your file name ends in “.csv.txt”.

Why Apple, why?
Why can't I decide what extension the file will have. I know for certain that .csv is right, .txt is wrong.

Omnifocus: Send to inbox

If you ar tired of seeing this in all text selection menus, and want to remove the "Omnifocus: Send to inbox" option:

Go to System Preferences > Keyboard > Keyboard shortcuts

Look up "Omnifocus: Send to inbox" and remove the tick in front of it.