When installing/upgrading plugins(haven't tried themes since I use my own modified theme), it always fails with this error message:
Downloading update from http://downloads.wordpress.org/plugin/all-in-one-seo-pack.zip…
Unpacking the update…
Could not create directory. /
I can still use plugins if I upload them manually using FTP, but upgrading plugins manually can quickly become a nuisance. Any solution?