Couldn't search account by unicode names

[Jacara]

I'm testing 6.1 version.

It could not able to search account by unicode name. I found the reason of this problem.

addons/account/account.py

def search(self, cr, uid, args, offset=0, limit=None, order=None,
            context=None, count=False):
        if context is None:
            context = {}
        pos = 0

        while pos < len(args):

            if args[pos][0] == 'code' and args[pos][1] in ('like', 'ilike') and args[pos][2]:
                args[pos] = ('code', '=like', str(args[pos][2].replace('%', ''))+'%')
            if args[pos][0] == 'journal_id':
                if not args[pos][2]:
                    del args[pos]
                    continue
                jour = self.pool.get('account.journal').browse(cr, uid, args[pos][2], context=context)
                if (not (jour.account_control_ids or jour.type_control_ids)) or not args[pos][2]:
                    args[pos] = ('type','not in',('consolidation','view'))
                    continue
                ids3 = map(lambda x: x.id, jour.type_control_ids)
                ids1 = super(account_account, self).search(cr, uid, [('user_type', 'in', ids3)])
                ids1 += map(lambda x: x.id, jour.account_control_ids)
                args[pos] = ('id', 'in', ids1)
            pos += 1

        if context and context.has_key('consolidate_children'): #add consolidated children of accounts
            ids = super(account_account, self).search(cr, uid, args, offset, limit,
                order, context=context, count=count)
            for consolidate_child in self.browse(cr, uid, context['account_id'], context=context).child_consol_ids:
                ids.append(consolidate_child.id)
            return ids

        return super(account_account, self).search(cr, uid, args, offset, limit,
                order, context=context, count=count)

See that line:
args[pos] = ('code', '=like', str(args[pos][2].replace('%', ''))+'%')

I want to change this line like this:
args[pos] = ('code', '=like', u'%s%%' % args[pos][2].replace('%', ''))