People who are unemployed are finding it relatively easier to find jobs. All around, it's a pretty good situation for the labor market.
It could be this reflects the recent rebound in energy prices that possibly made people a little more cautious again.
It could mean that those people don't show up in the jobless numbers until relatively late, so it's an evolving situations in terms of understanding the impact on the labor market.
With energy prices at least roughly flattening out, and with the labor market continuing to strengthen, those are probably two of the main reasons people are starting to get more optimistic.
The labor market has been strengthening for a while, but it may be that people are finally starting to become believers in it.