Light not recalculating over chunk borders

What I expected to happen was...:
All surrounding solid blocks to change light level

What actually happened was...:
Lighting fails to recompute over a chunk border

Steps to Reproduce:
Build a redstone flashing lamp one side of a chunk border and a solid block on the other.

disable day night cycle

set time from 6000 to 18000 and simple lighting fails to recompute the light level of the solid block in the next chunk.