diff --git a/basis/http/client/client.factor b/basis/http/client/client.factor
index 805929d27b..307fdd5031 100644
--- a/basis/http/client/client.factor
+++ b/basis/http/client/client.factor
@@ -165,7 +165,7 @@ ERROR: download-failed response ;
     present file-name "?" split1 drop "/" ?tail drop ;
 
 : download-to ( url file -- )
-    binary [ [ write ] with-http-get drop ] with-file-writer ;
+    binary [ [ write ] with-http-get check-response drop ] with-file-writer ;
 
 : download ( url -- )
     dup download-name download-to ;
diff --git a/basis/http/http-tests.factor b/basis/http/http-tests.factor
index da50a6f85f..45ad132677 100644
--- a/basis/http/http-tests.factor
+++ b/basis/http/http-tests.factor
@@ -392,4 +392,7 @@ SYMBOL: a
 
 [ "OK" ] [ "data" "http://localhost/a" add-port http-post nip ] unit-test
 
-[ ] [ "http://localhost/quit" add-port http-get 2drop ] unit-test
\ No newline at end of file
+! Check that download throws errors (reported by Chris Double)
+[ "http://localhost/tweet_my_twat" add-port download ] must-fail
+
+[ ] [ "http://localhost/quit" add-port http-get 2drop ] unit-test
diff --git a/basis/opengl/textures/textures.factor b/basis/opengl/textures/textures.factor
index fdf21c32c2..a565a14597 100755
--- a/basis/opengl/textures/textures.factor
+++ b/basis/opengl/textures/textures.factor
@@ -38,10 +38,12 @@ TUPLE: single-texture image dim loc texture-coords texture display-list disposed
         [ next-power-of-2 ] map
     ] unless ;
 
-: (tex-image) ( image -- )
-    [ GL_TEXTURE_2D 0 GL_RGBA ] dip
-    [ dim>> adjust-texture-dim first2 0 ]
-    [ component-order>> component-order>format f ] bi
+: (tex-image) ( image bitmap -- )
+    [
+        [ GL_TEXTURE_2D 0 GL_RGBA ] dip
+        [ dim>> adjust-texture-dim first2 0 ]
+        [ component-order>> component-order>format ] bi
+    ] dip
     glTexImage2D ;
 
 : (tex-sub-image) ( image -- )
@@ -55,7 +57,9 @@ TUPLE: single-texture image dim loc texture-coords texture display-list disposed
     gen-texture [
         GL_TEXTURE_BIT [
             GL_TEXTURE_2D swap glBindTexture
-            [ (tex-image) ] [ (tex-sub-image) ] bi
+            non-power-of-2-textures? get
+            [ dup bitmap>> (tex-image) ]
+            [ [ f (tex-image) ] [ (tex-sub-image) ] bi ] if
         ] do-attribs
     ] keep ;