I rendered the entire world from zoom 0 to zoom 10. The higher I went the more I noticed that various tiles had a series of streaks that look like barcodes. Some were black streaks on land and water. Other streaks were pink or green on land. In the latter tiles, it looked like the tiles were squished to half their size (squished to the left).
Any ideas why this might be?
The box used to render the tiles was a RHEL5 box and I used the Mapnik wiki.
– Kevin