diff merb-parts-0.9.3/lib/merb-parts/part_controller.rb merb-parts-mine/lib/merb-parts/part_controller.rb
73c73
<       @web_controller.instance_variable_set(:@_merb_partial_locals, @_merb_partial_locals)
---
>     	@web_controller.instance_variable_set(:@_merb_partial_locals, @_merb_partial_locals) if @_merb_partial_locals