API new year hangover?

I wonder if the flukso api has digested the switch to 2014 without problems.
My queries to the api don't work anymore with start and end query parameters.

I try this:
curl -v -X GET -H "Accept: application/json" -H "X-Version: 1.0" -H "X-Token: d8a8ab8893ea73f768b66b45234b5c3a" "https://www.flukso.net/api/sensor/c1411c6b4f9910bbbab09f145f8533b9?start=1356994800&end=1388375444&unit=watt"

And get:

* Adding handle: conn: 0x13fecc0
* Adding handle: send: 0
* Adding handle: recv: 0
* Curl_addHandleToPipeline: length: 1
* - Conn 0 (0x13fecc0) send_pipe: 1, recv_pipe: 0
* About to connect() to www.flukso.net port 443 (#0)
* Trying 109.74.196.232...
* Connected to www.flukso.net (109.74.196.232) port 443 (#0)
* successfully set certificate verify locations:
* CAfile: none
CApath: /etc/ssl/certs
* SSLv3, TLS handshake, Client hello (1):
* SSLv3, TLS handshake, Server hello (2):
* SSLv3, TLS handshake, CERT (11):
* SSLv3, TLS handshake, Server finished (14):
* SSLv3, TLS handshake, Client key exchange (16):
* SSLv3, TLS change cipher, Client hello (1):
* SSLv3, TLS handshake, Finished (20):
* SSLv3, TLS change cipher, Client hello (1):
* SSLv3, TLS handshake, Finished (20):
* SSL connection using RC4-SHA
* Server certificate:
* subject: description=CAW9NEEP6FgUsBwL; C=BE; CN=www.flukso.net; emailAddress=postmaster@flukso.net
* start date: 2013-09-05 02:58:41 GMT
* expire date: 2014-09-06 02:38:44 GMT
* subjectAltName: www.flukso.net matched
* issuer: C=IL; O=StartCom Ltd.; OU=Secure Digital Certificate Signing; CN=StartCom Class 1 Primary Intermediate Server CA
* SSL certificate verify ok.
> GET /api/sensor/c1411c6b4f9910bbbab09f145f8533b9?start=1356994800&end=1388375444&unit=watt HTTP/1.1
> User-Agent: curl/7.32.0
> Host: www.flukso.net
> Accept: application/json
> X-Version: 1.0
> X-Token: d8a8ab8893ea73f768b66b45234b5c3a
>
< HTTP/1.1 400 Bad Request
* Server nginx/1.4.4 is not blacklisted
< Server: nginx/1.4.4
< Date: Wed, 01 Jan 2014 21:56:01 GMT
< Content-Length: 0
< Connection: keep-alive
<
* Connection #0 to host www.flukso.net left intact

However, with interval instead of start and end it works fine:
curl -v -X GET -H "Accept: application/json" -H "X-Version: 1.0" -H "X-Token: d8a8ab8893ea73f768b66b45234b5c3a" "https://www.flukso.net/api/sensor/c1411c6b4f9910bbbab09f145f8533b9?interval=hour&unit=watt"

Thanks,
roel