Request for help getting Stripe Payment Processor working in CiviCRM/Wordpress
Soooo....

I found the problem. My API key had managed to get spaces in it, presumably when I copied it from the Stripe interface. I didn't see the spaces because the text is obfuscated like a password.

The fact it had spaces was causing a Javascript error. Which didn't come up ANYWHERE in the interface, until I had the Chrome developer tools open. And I suddenly noticed the error on the console. 

Ultimately, it would be really helpful if such errors were reported to the user. Possibly only when CiviCRM debug mode is on.

But not displaying those errors meant I wasted a whole bunch of time trying to track the problem down... :-(

Cheers,
Norman