Recently active topics in twitterfeed tagged with donation paypal

Hi. I just tried very hard to make a donation via Paypal, but I think there's either a problem with the form or something wonky about making a UK-based payment from another country.

In short, I tried numerous times to login via the page you link to, having entered a number into the amount field above, and I continue to get a "must enter a non-zero number" error message. I'm a regular Paypal user, and this is an error I haven't seen before.