Comment 2 for bug 611907

I think i have the same issue (at work so i can't view your gbr file.)

I solved a similar issue (tracks being printed out as rectangles with triangles missing where they touch at an angle, or a square missing where two tracks meet at a 90 degree bend) by downloading the latest stable release. (i'm running lucid as well)

However they are back again, but only on the second layer of a two layer board.

fwiw i havn't figured out how to make arcs yet, and it took me a while to find the option to route tracks at any angle (which should be enabled by default, or the check box have the verbage changed to "route tracks at any angle, rather than what it is now, but that's another story.)