Going from the 0.9 to 0.10 series includes a protocol incompatible change. The change was made by me in the spec and node code due to a security issue: joyent/node-http-signature#10. Considering how new HTTP Signature support is and the limited use of this spec I think it's safe to potentially cause breakage for any limited users of this feature.
Update http-signatures version.
Ping. Easy one-liner dependency bump. Please take a look when you get a chance.
sorry this took so long to get too, was busy running NodeConf :)