Newer Broadcom cards need new versions of ndiswrapper. Newer versions of ndiswrapper (since 1.13) also fix problems with wpa_supplicant, as long as the recommend "wext" wpa_supplicant driver is used. Network-Manager selects "ndiswrapperoblem" instead. Changing the network-manager source to remove the ndiswrapper special-case and just use "wext" fixes all problems for me.
Newer Broadcom cards need new versions of ndiswrapper. Newer versions of ndiswrapper (since 1.13) also fix problems with wpa_supplicant, as long as the recommend "wext" wpa_supplicant driver is used. Network-Manager selects "ndiswrapperoblem" instead. Changing the network-manager source to remove the ndiswrapper special-case and just use "wext" fixes all problems for me.