I just update my Magento 188.8.131.52 to 184.108.40.206 but after update i noticed that Magento import is not working. As i upload product CSV sheet thorough System --> Import/Export --> Import (method), it didn't show any error (in check data) after when click on import data then it just show loading image nothing else, when i cancel the process product are in back-end but products are not showing at front-end, also it's not asking for any indexing. I optimized the database and again create core_url, delete all logs, but any of them works.
If you are in a multi website installation check you are adding your products to your website.
Make sure you are not running out of memory while importing: Set the following values for you PHP:
600(remember to lower this after your test)
Also try importing ust one product and see if it works.
Check in your
var/log (both Magento and PHP) to see if you have any error report.