diff --git a/bg/Makefile.am b/bg/Makefile.am
index 2c65f03..92c0218 100644
--- a/bg/Makefile.am
+++ b/bg/Makefile.am
@@ -1,7 +1,7 @@
 # $Id$
 
 DIRS = tile scale
-EXTRA_DIST =  tile/014.png tile/circuit.png tile/backwave.jpg tile/40.png tile/blackstone.png \
+EXTRA_DIST =  tile/014.jpg tile/circuit.jpg tile/backwave.jpg tile/40.jpg tile/blackstone.jpg \
               tile/nebula.jpg scale/fourthday.jpg scale/gaia.jpg scale/galleon.jpg scale/night_of_the_dragon.jpg \
               README.backgrounds
 pixmapdir = $(pkgdatadir)/pix
diff --git a/bg/tile/014.jpg b/bg/tile/014.jpg
new file mode 100644
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diff --git a/bg/tile/014.png b/bg/tile/014.png
deleted file mode 100644
index 88c9774..0000000
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diff --git a/bg/tile/40.jpg b/bg/tile/40.jpg
new file mode 100644
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diff --git a/bg/tile/40.png b/bg/tile/40.png
deleted file mode 100644
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diff --git a/bg/tile/blackstone.jpg b/bg/tile/blackstone.jpg
new file mode 100644
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diff --git a/bg/tile/blackstone.png b/bg/tile/blackstone.png
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diff --git a/bg/tile/circuit.jpg b/bg/tile/circuit.jpg
new file mode 100644
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diff --git a/bg/tile/circuit.png b/bg/tile/circuit.png
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