Sorry I should have included this the first mail. My steps to reproduce:

* Download latest build from Hudson server, I used 21st Jan build at:  http://hudson.lukas-renggli.ch/job/Seaside%203.0/lastSuccessfulBuild/artifact/pier2/pier2.image +  changes

* Copy PharoV10.sources into download directory, start image and web server

* Register a new Pier app as:

PRPierFrame registerAsApplication: 'piersearch' kernel: (PRKernel new root: ((PRComponent named: 'search') componentClass: PRSearchView); name: 'testKernel').

* browse to localhost:8080/piersearch

* type anything into the search box and press "search"

* MessageNotUnderstood: receiver of "root" is nil

Hope this makes sense

Nick