Knife bootstrap - NameError: uninitialized constant Net::SSH::Authentication::Methods::GssapiWithMic

I’m trying to bootstrap another machine from a knife installation on Ubuntu
10.10.

I’m getting this error:

 WARN: Failed to connect to 192.168.1.10 -- NameError: uninitialized

constant Net::SSH::Authentication::Methods::GssapiWithMic

Here’s my list of installed gems:

*** LOCAL GEMS ***

aws-sdk (1.1.4, 1.1.2)
crack (0.1.8)
httparty (0.7.8)
json (1.5.3)
net-scp (1.0.4)
net-ssh (2.2.1)
nokogiri (1.5.0)
uuidtools (2.1.2)
yajl-ruby (0.8.2)

Any suggestions, it looks like net-ssh is installed ok.

It’s probably a Friday afternoon thing, quite obvious, but I’m tired and
need a beer.

Thanks Chaps