Bit of a problem today. I'm trying to buy Ommwriter from the Mac App Store (UK) but keep getting the error 'We could not complete your request. There was an error in the App Store. Please try again later. (undefined)' I've tried restarting the store, logging out and in again (store and Mac) and restarting the Mac but to no avail... I downloaded a free app with no problems as a test and my last paid app was last night (purchased Braid). Anybody got any ideas?