--- a/mercurial/cmdutil.py	Fri Feb 18 01:19:01 2011 +0100
+++ b/mercurial/cmdutil.py	Fri Mar 04 19:21:36 2011 -0600
@@ -261,6 +261,8 @@
     return ret
 
 def match(repo, pats=[], opts={}, globbed=False, default='relpath'):
+    if pats == ("",):
+        pats = []
     if not globbed and default == 'relpath':
         pats = expandpats(pats or [])
     m = matchmod.match(repo.root, repo.getcwd(), pats,