I'm liking Text Substitution and it works great for my needs. However, every time I try to us it in Mail, it doesn't work. I'll go to Edit > Substitutions > Text Replacement and re-select it, and it will work that time. But next time I go to mail, it's no longer selected. Anyone else have this problem? Any suggestions on a way to fix this? I am fully up to date on system updates and I have repaired permissions (to fix an unrelated issue). Edit: It appears to happen when I quit Mail. On relaunch, it is no longer selected.