First of all thanks for this awesome tool.
The graphs generated by our application cause GraphViz 2.8 to crash or rather not to produce any output (i.e., dot invoked via the default Windows GUI).
An example file in the .dot language (can supply more if required):
Input file: b939.dot
Comments:
[erg] This particular bug is fixed but there still appears to be
an anomaly in how the flat edges are drawn.
Owner: erg
Status: Fixed (10 May 2006)