Prestashop 1.7 doesn't have option to enter API key in administration to make Google Maps working. If you want to have Google Maps in order detail, you have to edit core file manually.
PHPUnit is a testing framework for PHP, used for testing during Prestashop development. It should not be distributed with modules, but in some cases it was (ZIP archives etc.). There is known vulnerability of PHPUnit that allows allows an attacker to execute PHP code on your shop, read your database and upload or modify files - install other malware etc.
PrestaShop 1.7 introduces a new Smarty helper to generate URLs. Here are some examples
New module for product comments in 1.7.6 version shows default number of stars as 3 stars. You can simple change it as you want.
This error can occur in two cases: 1. Client wants to edit his address but click on save button several times. This creates duplicity in database and client cannot make another order due to the carriers error. 2. Client who already made order before, changes the address. Then he can't make another order.
Prestashop 1.7 has issues with blocking CSS and JS cache files from theme folder by robots.txt.
If you see this error while trying to send the contact form, one reason may be that you have latest version of contactform module, but you didn't updated your theme.
Latest 1.7 version (including 126.96.36.199), contains bug related to bankwire module translations. Part of text is only in English.
In last weeks, there are many shops running on Prestashop receiving spam in Russian language. Prestashop has improved security of contact form in 188.8.131.52 version with this fix, but that helped only temporarily.
As cryptocurrencies are more and more popular, you may want to allow your customers to pay with Bitcoin, Litecoin, Dash or other crypto. Here are two examples of payment gateway services, that will allow you to easily implement cryptocurrencies in your store with their free Prestashop module.