One S on Orange - Wifi issues after 4.0.4 update

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http://forum.xda-developers.com – So wifes phone got the update a few days ago, since then the phone struggles to connect to the home wifi, was fine before the update. Once connected it's fine but if you go out and come back you either need to bounce the router or the phone to get it to connect. Anyone seen anything similar? (HowTos)