Graph Disappear when drilling in View Mode with BO 3.1

Hello everybody,

I have a problem with WebIntelligence. I have a report with several graphs and one drill down dimension. When I drill down on the dimension, some graphs disappear in the View Mode, but not in the Edit Mode. Do you know if it is a problem with BO 3.1? Any fixpack needed? Anyone can help me solving this issue?

Many thanks for your support,

Bea