New filings for jobless benefits dropped a bit last week, the Labor Department reported today. But the trend is still stuck in a rut. For most of this year, initial weekly jobless claims on a seasonally adjusted basis have been in a range of roughly 450,000 to 500,000. Last week’s tally of 456,000 is a slight improvement over the previous week’s 459,000, but there’s still no sign in the data that a dramatic decline is imminent for this series.