Hi guys. After 30 mins effort of Martin and 30 mins effort of me, Fuel 1.7 (the latest stable one) is already working in Pharo 1.1. It means the same version is working from Pharo 1.1 to Pharo 1.4. If you want to give it a try in Pharo 1.1 execute: Gofer new squeaksource: 'MetacelloRepository'; package: 'ConfigurationOfFuel'; load. ((Smalltalk at: #ConfigurationOfFuel) project version: '1.7') load. Gofer new squeaksource: 'Fuel'; package: 'FuelCompatibilityBeforePharo13'; package: 'FuelCompatibilityBeforePharo12'; load. Cheers -- Mariano http://marianopeck.wordpress.com