A previously good working edit form starting adding a backslash ( \ ) before every quotation character ( “ ) after save.
Before Save = src=”file.jpg”
After Save = src=\”file.jpg\”
I discovered the cause was located in a php.ini file (root – public_html)
The cause = magic_quotes
I turned [magic_quotes] OFF and it stopped adding the backslash
magic_quotes_gpc = On
magic_quotes_gpc = Off
Interestingly, I found 2 INI files and had to change both.
I hope it works for you too!