Several of you have encountered issues processing Gerber files - I wanted to highlight a few things.
The problem is that all design tools tend to export Gerber files in a slightly different way. Some blatantly violate the standard and other times there might be particular geometries in your file that cause problems. (i.e - overlapping pads, ground planes, acute angles in traces, etc)
As most CAD tools are not free it is pretty hard to anticipate and test for these problems, but rest assured we are constantly making improvements to the algorithms.
Step 1 - Send us the Gerbers!
If we do not know about the problem, we can't fix it. As soon as you encounter a problem with a file please send it our way. You can either submit a support package and tick the "Include Last Gerbers" checkbox or just email it to firstname.lastname@example.org
Gerber Processing problems get bumped to the top of the priority queue and we will do our best to apply a patch within a week or two.
Step 2 - The Gerbv workaround.
There is a free Gerber viewer called Gerbv. This software is a champ and can open all types of Gerber files.
We wrote about this in our user guides, but basically if you open the problematic gerber file with Gerbv, and then do "File -> Save Active Layer As...", then Gerbv will re-format the file.
Usually the V-One software will be able to open the updated file and you can go back to printing.
One of my old supervisors used to say that the good thing about standards is that there are so many. At the time I didn't get what he meant... but his words have been echoing in my head for about 2 years now.