Line breaks get removed in shipment comments

Hi, the shipment comment field removes the line breaks in the email that is sent to the customer.

If you insert text like this:

Para 1

Para 2

Para 3

the email will read

Comments[font=arial, sans-serif][size=3]: Para 1 Para 2 Para 3[/size][/font]

The comment is in the database with line breaks and the responsible template /design/themes/basic/mail/templates/shipments/shipment_products.tpl does not seem to make any amendments to the text.

{if $shipment.comments}


Any idea where the line breaks might be filtered out?