Having learned about the new beta5 of Canola2, I decided to try it and wanted to uninstall previous - beta 1 - from my N800. The answer was "Cannot uninstall canola2. Some modules are needed for other applications. Which were libecore0-evas (0.9.9.041+cvs200712200-maemo.7) and livedje0 (0.5.042-maemo1). I checked the list of installed stuff and saw none of the two libs. What is to be done to uninstall Canola?

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Problem solved. The installation of Beta5 above the older Canola eliminateted the capricious Beta1 and uninstall became possible.