I am in the Plugin Gallery, and when I click “install” next to QuickSubmit, I receive this message:
“Plugin was not successfully copied. This may be a permissions problem. Please make sure that the web server is able to write to the plugins directory (including subdirectories) but don’t forget to secure it again later.”
I also receive this message when I try upgrading others (I tried it with COinS and Translator)
I am using version 3.1.0.1.