[Pharo-project] latest build yields stack trace running #cleanUpForProduction

Using Pharo 1.4 (#220), I end up in: ByteSymbol(Object)>>doesNotUnderstand: #run:with:in: which was called from: (MCPackage named: self theScriptLoaderPackageName) unload. First I thought it was because I had OSProcess loaded when I ran cleanUpForProduction, and it stopped in an OSProcess class. Without OSProcess, the I got a slightly different problem: the doesNotUnderstand of #run:with:in: is due to something in #cleanUpForRelease. Trying to debug it, new debuggers pop up, and then the emergency evaluator. I have Seaside30/Magritte/Pier loaded, so I can try without those too. But, it used to work with all these things loaded. -- Yanni