Userscripts.org

Sometimes unsafeWindow.resourceTickerMetal, unsafeWindow.resourceTickerCrystal and unsafeWindow.resourceTickerDeuterium cannot be found and it causes errors.
I've fixed your script this way:

if(unsafeWindow.resourceTickerMetal && unsafeWindow.resourceTickerCrystal && unsafeWindow.resourceTickerDeuterium) {
var resource = {
'metal' : new Array(Math.floor(unsafeWindow.resourceTickerMetal['available']), unsafeWindow.resourceTickerMetal['production']),
'crystal' : new Array(Math.floor(unsafeWindow.resourceTickerCrystal['available']), unsafeWindow.resourceTickerCrystal['production']),
'deuterium' : new Array(Math.floor(unsafeWindow.resourceTickerDeuterium['available']), unsafeWindow.resourceTickerDeuterium['production'])
};
}

Hope it helps.
This script is great btw. ;)