I have just a fresh odoo instance without any customizations and interference. When I clicked on the customer statement option in accounting got this qwebexception.  

File "/home/odoo/odoo-server/openerp/addons/base/ir/ir_qweb.py", line 297, in render_node result = self.render_element(element, template_attributes, generated_attributes, qwebcontext) File "/home/odoo/odoo-server/openerp/addons/base/ir/ir_qweb.py", line 320, in render_element generated_attributes= name == "t" and generated_attributes or '')) File "/home/odoo/odoo-server/openerp/addons/base/ir/ir_qweb.py", line 297, in render_node result = self.render_element(element, template_attributes, generated_attributes, qwebcontext) File "/home/odoo/odoo-server/openerp/addons/base/ir/ir_qweb.py", line 320, in render_element generated_attributes= name == "t" and generated_attributes or '')) File "/home/odoo/odoo-server/openerp/addons/base/ir/ir_qweb.py", line 295, in render_node result = self._render_tag[t_render](self, element, template_attributes, generated_attributes, qwebcontext) File "/home/odoo/odoo-server/openerp/addons/base/ir/ir_qweb.py", line 434, in render_tag_if if self.eval_bool(template_attributes["if"], qwebcontext): File "/home/odoo/odoo-server/openerp/addons/base/ir/ir_qweb.py", line 226, in eval_bool return int(bool(self.eval(expr, qwebcontext))) File "/home/odoo/odoo-server/openerp/addons/base/ir/ir_qweb.py", line 195, in eval raise_qweb_exception(message="Could not evaluate expression %r" % expr, expression=expr, template=template) File "/home/odoo/odoo-server/openerp/addons/base/ir/ir_qweb.py", line 192, in eval return qwebcontext.safe_eval(expr) File "/home/odoo/odoo-server/openerp/addons/base/ir/ir_qweb.py", line 104, in safe_eval return eval(expr, None, locals_dict, nocopy=True, locals_builtins=True) File "/home/odoo/odoo-server/openerp/tools/safe_eval.py", line 298, in safe_eval return eval(c, globals_dict, locals_dict) File "", line 1, in <module>QWebException: "'res.partner' object has no attribute 'trust'" while evaluating"context.partner_id.trust == 'good'"