(Salem, OR)  --  Oregon's jobless situation is taking a little hit, but unemployment remains low.  State numbers out today indicate that joblessness inched upward, to three-point-eight-percent, but is well below the five-point-one mark of a year ago.  A state economist says many Oregonians are back in the workforce "in search of the more-plentiful and better-paying jobs in recent years."  The jobs report shows the number of part-time workers who are looking for full-time jobs is at its lowest point in 15 years.