Steps to reproduce:
1. Start the Portal.
2. Deploy "web-form-portlet-188.8.131.52-ee-ga2-20120731110418084.war".
3. Add the portlet to a page.
4. Configure it: check "Save to File" and set a file name to it.
5. Fill the form with some sample data.
6. Configure the portlet again and export its data to a file.
7. Compare the your two files. The file that has been created by the Server will not contain the column names.
Same results on trunk (last commit: "f2daa5a").