You did tried skateman's solution?
skateman wrote:Meanwhile I found a solution for the issue.
I took all files from /etc/fonts and /usr/share/fonts of the Ubuntu System and generated a 006-fonts-test.xzm-File. Now it works fine!
The problem was, that font-types like Arial were converted into a standard font type (I don't know which kind of font type) and so the width and design of the text got changed.