I'm new to s9y. I installed the Spartacus plugin and it works fine for fetching and installing sidebar plugins, but whenever I click on "Check for new Event Plugins" or "Click here to install new event plugin", I get an error message like this:

Fetched 257028 bytes from the URL above. Saving file ...

Any time I add a new user, all possible groups are in the "group membership" field. I can use Ctrl-click or Shift-click to select multiple groups in the field, but there is no way to remove those groups from the field. I tried the delete key and everything else I could think of.

Your earlier answer ...