This ETH food science web site (in German only) makes an interesting point. They say that as long as Switzerland doesn't make it mandatory for food manufacturers to declare trans-fats or introduce a limit on their use in food products (only required for baby food), it's difficult for consumers to discern what type of fats they are eating.

http://www.swissfir.ethz.ch/services/zutaten/tfs/index

Sounds as though Muze is right in that it's best to limit consumption of food with hydrogenated or partially hydrogenated fats, for lack of detailed information.