In the pkg_postinst() function of the ndiswrapper ebuild (all releases) there is a chunk of code which detects the brand name of the network interface (via lspci). The code is wrong because 'lspci -n' reports the class but not the information needed while 'lspci -nn' doesn't report the class. I created a patch to solve this aesthetic problem :-)
Created attachment 143608 [details, diff] postinstall.patch
fixed in 1.56