Hi Steen,
Sorry about the inconvenience caused.
We are able to reproduce the issue, We will fix this issue in our next service pack release which is expected to be rolled out in the end of November, 2014. However, you can resolve this issue by set the Font property without creating new instance for ChartAxisLabelStyle and Title.
We have prepared a sample based on this and you can find the sample in the following location.
Please let us know if you require further assistance on this.
Thanks,
Prabakaran
Attachment:
ChartAxisTitleSample_7917abb1.zip