I can't access the Marketplace on my phone, using windows phone 7.5. I get the error as follows;
Marketplace error

We're sorry, but we can't complete your request at the moment.

Try launching Marketplace again. If the problem continues, check back in a little while or try restarting your phone.

Error code: 80070057

Anyone any ideas? This is happening since I checked this morning, restarted the phone a few times, no joy. Internet connection is fine as I have it tethered to the laptop at the moment, and the browser works fine on it.