I uploaded a new model in a .x3d file. It has color, and looks good in MeshLab. I have successfully uploaded .x3d files before. The file is generated by Mathematica. After the upload, I get the usual message (about receiving feedback by email). However, I don't get a message and nothing happens (for two days). I would expect that, if the file is corrupted or otherwise not processable by Shapeways, they send me an email with some explanation. I did succeed in uploading the .stl version without color. Any suggestions?