Quote Originally Posted by DrByte View Post
If you display that admin page in your browser, where those customer or product details apparently don't "show", and then choose View Source in your browser, do those details show up in the raw HTML?

Also what CHARSET are you using in your english.php file?
What Character Set and/or collation is your database using?
I've already gone back to 1.3.9g (and the problems are solved), so I can't tell you whether customer & product details show up in View Source.

In my english.php files, CHARSET is iso-8859-1.

MySQL charset: UTF-8 Unicode (utf8)
MySQL connection collation: utf8_unicode_ci