I receive an "Invalid Key" page using my key even when using the sample API URLs. I simply copy and paste my key into the key argument of several of the sample requests, and all return this error.
I obtained my key a couple of months ago, but this is the first opportunity I've had to begin work with it. I clicked "register" again on the error page, which it promptly resends the same API key as before but to no avail.
My key ends with "e27cb9".
Thanks for the help.