[Pharo-project] Annoying bug: UndefinedObject(Object)>>doesNotUnderstand: #mimeTypes

This bug is really annoying. I am in windows, using 10371. Both: Pharo and PharoCore, have the same problem. To reproduce: 1) Go to squeak 2) alt + tab to switch to another windows 3) alt + tab again to come back to squeak At that moment, we you get the focus in Squeak you will get TWO DNU. They are the same. I attach SqueakDebug.log Please consider this for 1.0 because it is unusable. I created the ticket: http://code.google.com/p/pharo/issues/detail?id=945 Cheers, Mariano