Job config hangs with 1.528 update

Steps:
1) Deploy a fresh jenkins.war into tomcat with an empty ~/.jenkins configuration.
2) Create a job Foo
3) Install Publish Over SSH plugin
4) Go to job Foo

Expected: able to edit Foo's configuration
Actual: config screen hangs at "Loading ..."

No errors in the tomcat log. If I revert to Jenkins 1.527 the issue disappears.