[TIMOB-1401] Window backgroundGradient does not work in iOS 4.

A customer reported that windows backgroundGradient does not render correctly. I could not get it to display at all using the following code.

var winCaseOverview= Titanium.UI.currentWindow;
winCaseOverview.backgroundGradient = {

                                    type:'linear',
                                    colors:[{
                                                color:'#383838',
                                                position:0.0
                                            }, 
                                            {
                                                color:'#2a2a2a',
                                                position:1.0
                                            }]
                                    };

Since there is not an example any where, this could be a code issue.