User Preferences supersede syntax-specific which supersedes default
Make sure it's in User/Preferences.sublime-settings
Thanks for the help! But my preferences are indeed in the user folder. In any case, according to the docshttp://www.sublimetext.com/docs/2/settings.html
Settings files are consulted in this order:
<Buffer Specific Settings>
But I've checked the Packages/<syntax> directory and there's nothing there.
After further testing. I believe the problem *was* initially about the auto-detect, but I foolishly forgot to restart the program *or even to close and reopen the files I was working on.* That's embarrassing, but I guess I'll just know better for next time.
Thanks for your help!