Microb will _not_ work on OS 2007HE... it needs the latest 4.2007 version of OS 2007 which was only recently released for the N800 - OS 2007HE is based on 2.2006 of OS 2007. A new version of OS 2007HE should be available soon, and this version may be compatible with Microb. The topic for this thread refers to Minimo which is not Microb. Minimo may work just fine on OS 2007HE, and you shouldn't need the extra Herring repository which is a workaround for OS 2006. Finally, you may have to reflash your device in order to undo whatever changes were made by attempting to install Microb.