Redirects to links from email after login throws an error

I received a notification email from pownce that a file had been posted. I clicked the link and was prompted to login. When I logged in I was redirected to:

http://s3.amazonaws.com/powncemedia/1...

Where I was presented with this output on the screen:
SignatureDoesNotMatchThe request signature we calculated does not match the signature you provided. Check your key and signing method.A008F4D3DA9AE7AFas0Vtbi6YwFQYkJkh79C1fizVBE=47 45 54 0a 0a 61 70 70 6c 69 63 61 74 69 6f 6e 2f 78 2d 77 77 77 2d 66 6f 72 6d 2d 75 72 6c 65 6e 63 6f 64 65 64 0a 31 32 32 32 38 37 38 35 39 33 0a 2f 70 6f 77 6e 63 65 6d 65 64 69 61 2f 31 37 39 31 32 35 2d 33 36 35 35 39 34 34 2e 6a 70 671JBBGSK93YCBJH6SZ7R217JKrD1KXF5o28eEyNgzMrSFo8LhbAc3xRgBLwo64Emq9Vsp4MmkHmlNcLVFhsgTGET application/x-www-form-urlencoded 1222878593 /powncemedia/179125-3655944.jpg

The source of this is:
<error>SignatureDoesNotMatch<message>The request signature we calculated does not match the signature you provided. Check your key and signing method.</message><requestid>A008F4D3DA9AE7AF</requestid><signatureprovided>as0Vtbi6YwFQYkJkh79C1fizVBE=</signatureprovided><stringtosignbytes>47 45 54 0a 0a 61 70 70 6c 69 63 61 74 69 6f 6e 2f 78 2d 77 77 77 2d 66 6f 72 6d 2d 75 72 6c 65 6e 63 6f 64 65 64 0a 31 32 32 32 38 37 38 35 39 33 0a 2f 70 6f 77 6e 63 65 6d 65 64 69 61 2f 31 37 39 31 32 35 2d 33 36 35 35 39 34 34 2e 6a 70 67</stringtosignbytes><awsaccesskeyid>1JBBGSK93YCBJH6SZ7R2</awsaccesskeyid><hostid>17JKrD1KXF5o28eEyNgzMrSFo8LhbAc3xRgBLwo64Emq9Vsp4MmkHmlNcLVFhsgT</hostid><stringtosign>GET

application/x-www-form-urlencoded
1222878593
/powncemedia/179125-3655944.jpg</stringtosign></error>