If i create something in powerpoint 2003, for example a flowchart and it is sent to someone using powerpoint 2010, how likely is it that there might be problems for the other person opening it up in the 2010 version? Or vice versa.

I have 2003 installed, never really used it, but now im most likely going to want to work in powerpoint soon to create flowcharts, as these flowcharts will be passed onto other people im thinking that it might be better for me to buy 2010, get used to that version and possibly avoid problems.

What do you think?