Every so often I get a map that is a large but blank png. When I run the .dot through the jpeg output, I always get what I'd expect.
This is a suboptimal solution as the jpg output cannot handle considerably large graphs that this thing usually generates.
I am attaching the .dot and the bad png.
Input file: b1274.dot
Output file: b1274.png
Fix: I wish I knew. I've checked the archives but don't see anything recent or relevant.