Comment 4 for bug 118176

This happens also in ubuntu 9.04

I compared the message code between the one generated by kmail and thunderbid. There is one header that differs. In kmail the header is:

Content-type: text/plain
 charset="us-ascii"

which leads to a correct formating

The header created by thunderbird is:

Content-type: text/plain
 charset="ISO-8859-15"
 format=flowed

Here all the newlines of the signature a are lost.