In grails 1.3.2, I can access all parameters in params in layout (and taglib called from layout).
However, when upgraded to 1.3.4, when access params in layout, there are only controller, action and id. Params contains complete paameter when access from view.
params in view: [controller: 'app', action: 'act', id: '3', other: 'Y', this: 'that']
params in layout: [controller: 'app', action: 'act', id: '3']