Since I applied the SUPEE-6788 patch to my CE 1.7.0.2 Magento installation, I can't access anymore the page of the admin "Newsletter > Newsletter queue". It results in a 404 error. The admin URL of that page is the following: http://domain.com/shop/index.php/admin/newsletter_queue/index/
I also fixed all other blocks & extension with the SUPEE-6788 Developer Toolbox (https://github.com/rhoerr/supee-6788-toolbox), but it cannot fix this specific problem.
Thx for your help, I cant send newsletters anymore...