Thomas Bruederli wrote:

...

•  if (empty($o_part->charset))
  

•  if (empty($o_part->charset) || strtolower($o_part->charset) == 'us-ascii')
     $o_part->charset = $this->default_charset;
  
  

Hi Alec

Hmm, I have some concerns that this change might break the display of messages that really are encoded with US-ASCII. How is such an e-mail displayed if the default charset is some chinese character set?

I think most of encodings contains ASCII subset, so there should be no significant problem with this. We need to test this more.