Shuriken "Distance" emission mode not working

My particle system works as expected in Time emission mode, but I need it to emit X particles per unit traveled. I’d almost swear I’ve successfully used Distance mode before, but right now when I change from Time to Distance it simple stops emitting particles (yes, I am moving the object).

Shouldn’t 5000 distance mean “Emit 5000 particles per one unit moved”? What’s going on?

Here’s a picture of my system setup - default settings with Distance instead of Time. :confused:

https://www.dropbox.com/s/wshchxoikejdwn7/distance%20emission.png

You must simulate particles in World space to use distance mode. Simulating in Local space does not work.