Hi Jesse,
I have a strange behaviour of the autocomplete of the @tags after a fresh start of Taskpaper.
- 3.5 Preview (237)
 - I’ve auto complete on for tags in preferences
 
How to reproduce:
- Quit Taskpaper with a document open ( press ⌘Q)
 - Open Taskpaper
 - Type a tag (like 
@do..but no autocomplete is happening - Open Taskpaper Preferences
 - Quit TP preferences
 - start typing a tag => auto complete is back!
 
== feek