@iipa Pasting stuff from Word should be no problem ... I think most of our clients likely do this. So you definitely shouldn't get an internal server error from PW at least. Though you might try setting $config->debug=true; in your /site/config.php file (temporarily) and trying again, just in case — that will make it produce a verbose error message. But it's more likely that it is coming from mod_security or some other Apache or PHP module on the server that is monitoring input and halting the request when it comes across something it doesn't like. I don't blame it, as MS word can produce some pretty sketchy looking markup. But between CKEditor and htmlpurifier, PW should be able to clean it up just fine once the server lets it through. But if it's an Apache/PHP module doing this (which seems likely) then nothing you adjust in PW can fix it since the module examines the request before PW even boots, so you'd instead have to disable or configure the Apache module (mod_security, suhosin, or whatever it might be).