I created a donut style pie chart in PPT 2010, and emailed it to a colleague using Lotus Notes. When he opened it the labels on the chart had moved around and were wrong. I thought maybe it was my mistake, fixed them, emailed it to him again, and once more they had moved!

Can anyone explain this and how can I prevent this from happening in the future? These were the company's business segments and percentages so a very important slide.

I am baffled and in all of my years as a presentation designer have never seen this happen!