Let's try that Turkish song again - copied from here:

Ali Babanın bir ?iftliği var
?iftliğinde horozları var
? ??r? ?? diye bağırır
?iftliğinde Ali Babanın

Hmmmm. It doesn't preview coreectly, which it did last time.
The dotless i and the g-breve have been converted to &-codes and appear correctly. The characters that posted correctly last time, such as C-cedilla appear as question marks.

Heres a u-umlaut and a c-cedilla from my keyboard: ? ?

I'll post it...