It's true that you don' get any results with leading dots if you are using auto wildcards. Using wildcards means that the search terms are processed differently. This is a limitation in Lucene.
As a solution, we'll change the AutoWildcard feature slightly. If it is enabled, leading dots will be stripped from the search terms, before the wildcard is added.
If you want more control over the wildcards, you can turn off AutoWildcards, and add the wildcard character to the words you want yourself.