After upgrading node using brew upgrade node:
$ node -v
v0.10.30
I do a npm update -g:
$ npm -v
1.4.23
There is a ERR when npm ls -g:
npm ERR! invalid: strip-ansi@0.2.2 /usr/local/lib/node_modules/npm/node_modules/columnify/node_modules/strip-ansi
npm ERR! not ok code 0
How can I fix the error?