Good again, I have a simple derivative doubt.
During these days, I have changed the CHMON permissions to the upload folder and files, but it did not solve anything 
After much searching, finally the Jetpack Plugin (and its “enable site accelerator” option) has made everything to load normally again 
But now… the locked images are not being unlocked 
This problem is precisely queried in this topic, and the solution discussed is “upgrade to version 1.6.2” 
but, I currently have Jetpack version 9.5.1 
What can I do? Some idea? 