I'm pretty sure this was always zero before, now it's always drawing some current.
There is a difference: I had the cordless set (Pana TGX7644) hooked up to the Obi110 port, now it's through some house distribution panel.
Should I be concerned about the imperfect connections or a few ohms here and there won't matter :)
State On Hook
LoopCurrent 1 mA
VBAT 57 V (12.2 V)
TipRingVoltage 45 V
I wouldn't worry about 1 milliamp, as long as your phones ring when they should -- that's a very low number, and the voltages are normal, so the line is still seen as on-hook. If you want to find out what's drawing the current, it would be easy to just go around the house and disconnect whatever is plugged into that line pair, one jack at a time, and see when the current draw goes away. It's probably one of your devices (phone, all-in-one printer/fax, fax machine, etc), using that on-hook current to power its circuitry.