Jar related operations error out with "duplicate entry" when .svn and other files

[dirtyvagabond]

While running "lein uberjar" on a subversion hosted project, we were getting this error:
java.util.zip.ZipException: duplicate entry: .svn/entries

Googling led to a page that had the same error due to being on a mac and having .DS_Store files. Long story short, adding this to our project.clj solves the problem:
:jar-exclusions [#".svn" #".DS_Store"]

Maybe lein should make this exclusion by default, for these and any other similar files that cause this problem? The thing is, no one ever wants to jar up their .svn and .DS_Store files, and this error is a real show stopper for any operations that involve jarring up the project.