--- xvfb-run.sh	2014-05-30 01:03:57.862452101 +0200
+++ xvfb-run.sh	2014-05-30 01:10:32.792647392 +0200
@@ -151,7 +151,7 @@
         error "temporary directory $XVFB_RUN_TMPDIR already exists"
         exit 4
     fi
-    AUTHFILE=$(mktemp -p "$XVFB_RUN_TMPDIR" Xauthority)
+    AUTHFILE=$(mktemp -p "$XVFB_RUN_TMPDIR" Xauthority.XXXXXXXX)
 fi
 
 # Start Xvfb.