Minor Description
In updateProductAverageCostOnReceiveInventory (https://fisheye6.atlassian.com/browse/ofbiz/trunk/applications/product/script/org/ofbiz/product/cost/CostServices.xml?hb=true#to587), there's a call to set-calendar with a "seconds" parameter of +1. The seconds value is passed to Integer.parseInt. A leading plus works in Java 7, but causes an exception in Java 6. Every other call to set-calendar in OFBiz with a positive value does not have a leading plus sign.