I noticed that after selling and buying goods from a port. That when I moved to the next sector using Local Map the display would shift up a line. (scrollbar would show) I couldn't see anything being written at the bottom of the page but knew something had to be there.
So I highlighted that area of the page and seen this.
Warning: Invalid argument supplied for foreach() in /var/www/localhost/lib/Default/SmrPort.class.inc on line 1215
Edit: Not sure if this matters or not but I am using the Freon22 Interface. I also made a bug report within the game but am posting here also just incase.