Thanks SAEngraver, I understand what you're saying, but it's specifically a file problem... most of our design work is fine, just a percentage has the corruption. (we have around 20,000 designs on file) Worked with curves and color styles, I know it's something to do with these, but just can't put my finger on it. 2 weeks solid work, costing me thousands. Corel, as usual, will not reply, even during the warranty period. We may return for Illustrator on Monday.