I've been running into the same exact roadblock, the difference is that we are using Solr 1.3.0. I assumed it was some error in my configuration and it could very well still be the reason no suggestions were returned.
Here's the search query I ran and I'm pretty sure I don't have "heltl" in my index.
<result name="response" numFound="0" start="0"/>
Here are my messages to the mailing list, as indicated I've also tried adding a regular handler which didn't respond as expected, I believe that was the method recommended previously but described on the wiki (first link below) maybe those instructions are wrong?