[rules-users] ClassCastException when comparing date type with literal

Hi, guys: I meet a strange issue and need your help again... I am using Drools 4.0.7. When my rule condition is as *Message( date > "Mar-01-2012" )*, everything is OK. But if I change it to be as below: *$msg : Message() Order ( $msg.date > "Mar-01-2012" )* I will meet "java.lang.String cannot be cast to java.util.Date" ClassCastException. "Order" is another fact. I attach the exception call stack. Please check it. It looks like a bug to me. Do we fix it in later release? If so, can you tell me which release contains the fix? Thanks!