Exporting Multiple Lines Text Fields to HTML
From SmartWiki
If you wish to include a Multiple Lines Text field in a report that will be displayed or exported to HTML, the line breaks will not be displayed.
The line breaks stored in the Multiple Lines Text field can be converted to a line break that will be displayed in HTML (<br />) by including the following in the Calculated Value of the field:
REPLACE([this],CHAR(13,10),"<br />")