Hi, I used GP by ECJ to do experiments and had two findings below. Hope you 
can help to explain. 
1. Same PC, same ECJ parameter setting, same seed number, experiments 
were run at different time. One was run at end of 2009; the other was run 
yesterday. The results were different. 
2. Different PC, same ECJ parameter setting, same seed number, experiments 
were run at different time(around 2 months time). The results from 2 pcs  
were same.

Many Thanks