--- a/bin/imager.check	Fri Jul 29 16:06:55 2011 +0200
+++ b/bin/imager.check	Sun Jul 31 15:03:06 2011 +0200
@@ -133,6 +133,9 @@
             # we don't need uncompressed files if an compressed version
             # exists
             unlink $_ and return if -f "$_.gz";
+	    unlink "$_.x" and return if -f "$_.x.gz";
+
+	    # FIXME: do we need a compressed version?
 
             # cut away the first part of the filename and
             # some optional extension
@@ -201,7 +204,10 @@
 
         next
           if -f "$dir/data/$k"
-              or -f "$dir/data/$k.gz";
+              or -f "$dir/data/$k.gz"
+	      or -f "$dir/data/$k.x"
+	      or -f "$dir/data/$k.x.gz"
+	      or -f "$dir/data/$k.gz.x";
         say "missing $k @$i";
         @invalid{@$i} = ();
     }