On Mac OSX 10.5 (Leopard) when the Variations application tries to launch a web page, either as a result of a link or menu item, the page will only display if the default web browser is already running. Therefore, the workaround to this problem is to make sure the default browser is running when using Variations.
On Mac OSX 10.5 (Leopard) help menu search returns results unrelated to Variations
Mac OSX 10.5 (Leopard) has a search embedded in the help menu of every application. This search returns links to menu items within Variations and links to non-Variations help documentation. Currently, Variations does not make use of the Mac OSX help documentation features. This results in Apple's default functionality which is to return any help documentation results in the help menu search. There is no workaround.