I just uploaded a muO release compatible with 4.1
http://map.squeak.org/account/package/90a2baac-b877-4412-8280-0b148f85c415/autoversion/52muO development will now happen in 4.1; so far I had stick to 3.8 by
lack of interest in 3.9 and 3.10 but the release of 4.1 brings new
horizons and a very nice development platform. Thanks to everybody for this.
Edgar, thank you for your help in having muO load in 4.1 !
Stef