I will make more tests next week. It appears the bug does not occur on my Linux (Ubuntu Trusty), so I was able to export these files to DXF files. I tried with "Better DXF output" and "Big Blue Saw" extensions, but none of these seem to work, and I had to manually transform everything to paths, insert lots of new nodes between nodes of every splines, and then transform segments into lines. As far as i understand, "Better DXF output" and "Big Blue Saw" aimed at embedding these actions into an automated export process, but they may not have been maintained, and did not survive Inkscape evolutions that occured in the meantime... :/ A shame, as DXF output is apparently the only common file format with Corel, which is the reference software for running laser cutters. I'd really love to find a solution to let users of our fablab use Inkscape without having to worry about paths, splines, nodes, etc. Any hope ?
I will make more tests next week. It appears the bug does not occur on my Linux (Ubuntu Trusty), so I was able to export these files to DXF files. I tried with "Better DXF output" and "Big Blue Saw" extensions, but none of these seem to work, and I had to manually transform everything to paths, insert lots of new nodes between nodes of every splines, and then transform segments into lines. As far as i understand, "Better DXF output" and "Big Blue Saw" aimed at embedding these actions into an automated export process, but they may not have been maintained, and did not survive Inkscape evolutions that occured in the meantime... :/ A shame, as DXF output is apparently the only common file format with Corel, which is the reference software for running laser cutters. I'd really love to find a solution to let users of our fablab use Inkscape without having to worry about paths, splines, nodes, etc. Any hope ?