Looks like this comes from http://code.google.com/p/pharo/issues/detail?id=3623 and the changes on ConfigurationOfOmniBrowser in version 1.2.3
However: the config looks good to me since the '1.2-baseline' (which is used in the 1.2.3 version) looks like this: package: 'OCForOB' with: [ spec repository: 'http://www.squeaksource.com/OCompletion'; and when I manually load (ConfigurationOfPharo project version: '1.2-beta2') load it works without a problem. Can you start a new build on Hudson to see if it is still a problem? Or try a manual build on the machine. How does '/builds/workspace/Pharo 1.2/Pharo-1.2/Pharo-1.2.st' look like? Bye T. -- Neu: GMX De-Mail - Einfach wie E-Mail, sicher wie ein Brief! Jetzt De-Mail-Adresse reservieren: http://portal.gmx.net/de/go/demail