[Puppet Users] Really long puppet runs...

I've got a 3.0.0 node on Ubuntu 12.04 talking to a 2.7.19 master on Ubuntu
10.04. Until yesterday, this worked fine (and the other 3.0.0 node works
fine as well)

This node is in my 'test' environment and the other node uses an almost
identical node def except is in the 'prod' environment.

I don't know exactly what changed, but I am hoping someone can help me
track this down.

Of the two nodes, I did move the one that is still functioning normally out
of test and into prod, but other than hostnames and environments, they use
the same code base and settings.

I've posted a partial log (sudo puppet agent -t --debug) from the node
having problems at https://gist.github.com/4001797

But the basic issue is that puppet runs have started taking 15-20 minutes,
and in each case, the long pause is after

Debug: /Schedule[puppet]: Skipping device resources because running on a
host
Debug: file_metadata supports formats: b64_zlib_yaml pson raw yaml; using
pson
Debug: file_metadata supports formats: b64_zlib_yaml pson raw yaml; using
pson

is displayed.

I commented out a section of the node def to simplify, and same issues.

Any help in tracking this down would be much appreciated.