QTextEdit with Html margin Problem

[_whoiam_]

I have a QTextEdit and I want to append some incomming messages.

it looks like this

historyText->append("<div style=\"color: red;\"><b>" + time + "</b></div><div style=\"margin-left: 10px;\">bla</div>");

but every time I append more than one line I get something like this

Screenshot

I dont know why the margin is applied to the bold secton too