Nokia have updated the dedicated Foursquare application to version 1.02 (9). You can pick up the update from the Ovi Store either through the updates tab, or going to the Foursquare app page and selecting the update option from there. The major change in this version is to accommodate the new Foursquare API methodology.
Other than that, there's no functional difference to the previous version, but as the app already covered the majority of the tools and options offered by Foursquare, this isn't as important as you might think.