Saas is already supported. I've never used less; what would it take to support it?

This works for me. Are you on the latest version?

I just get "Can't find 'partial' in path". But it does work if I use "render '_blah'". Is that what I should do instead?

Are you doing this in a controller or a view? The rails.vim gf logic reflects the rails logic on this, where in a controller it looks for an action/template and in a view a partial.

In a view, gf on "render 'blah'" gives the error "'blah' not found in path".

I still can't reproduce this. Can you zip up a minimal rails app that demonstrates it and email me or something?