Flashers are sometimes displayed behind an object in the background.
See this image
for example. The red flasher is one of the Neo-docklights flashers, so it is actually located between the player and the station.
This happens with a modified version of Neo-docklights that adds a phase parameter to the flashers, but Hoqlinq has also spotted anomalies with the unmodified version. Modified OXP and slightly more info in this thread
This is present on the latest master, running under Windows Seven and NVidia graphic card.