diff --git a/configure.in b/configure.in
index 2e8ea72..d8b5a57 100644
--- a/configure.in
+++ b/configure.in
@@ -150,7 +150,7 @@ AC_SUBST(x_libs)
 AC_SUBST(dlopen_libs)
 
 AC_OUTPUT(imlib2-config Makefile loaders/Makefile src/Makefile test/Makefile \
-          filters/Makefile demo/Makefile dox/Makefile imlib2.spec,
+          filters/Makefile demo/Makefile imlib2.spec,
 [
 test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h;
 chmod +x imlib2-config
diff --git a/loaders/loader_png.c b/loaders/loader_png.c
index ff7ecb4..986413e 100644
--- a/loaders/loader_png.c
+++ b/loaders/loader_png.c
@@ -131,6 +131,8 @@ load (ImlibImage *im, ImlibProgressFunction progress,
 	png_set_packing(png_ptr);
 	if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
 	   png_set_expand(png_ptr);
+        if (im->data)
+           free(im->data);
 	im->data = malloc(w * h * sizeof(DATA32));
 	if (!im->data)
 	  {
diff --git a/src/Imlib2.h b/src/Imlib2.h
index 058cea6..3c07e59 100644
--- a/src/Imlib2.h
+++ b/src/Imlib2.h
@@ -148,7 +148,7 @@ DATA32     *imlib_image_get_data(void);
 DATA32     *imlib_image_get_data_for_reading_only(void);
 void        imlib_image_put_back_data(DATA32 *data);
 char        imlib_image_has_alpha(void);
-void        imlib_image_set_never_changes_on_disk(Imlib_Image image);
+void        imlib_image_set_never_changes_on_disk(void);
 void        imlib_image_get_border(Imlib_Border *border);
 void        imlib_image_set_border(Imlib_Border *border);
 void        imlib_image_set_format(const char *format);
@@ -214,8 +214,8 @@ void       imlib_set_font_cache_size(int bytes);
 void       imlib_flush_font_cache(void);
 int        imlib_get_font_ascent(void);
 int        imlib_get_font_descent(void);
-int        imlib_get_maximum_font_ascent(Imlib_Font font);
-int        imlib_get_maximum_font_descent(Imlib_Font font);
+int        imlib_get_maximum_font_ascent(void);
+int        imlib_get_maximum_font_descent(void);
 
 Imlib_Color_Modifier imlib_create_color_modifier(void);
 void                 imlib_free_color_modifier(void);
diff --git a/src/api.c b/src/api.c
index e2f3418..7e6045e 100644
--- a/src/api.c
+++ b/src/api.c
@@ -583,7 +583,7 @@ imlib_image_has_alpha(void)
 }
 
 void 
-imlib_image_set_never_changes_on_disk(Imlib_Image image)
+imlib_image_set_never_changes_on_disk(void)
 {
    ImlibImage *im;
 
@@ -1792,7 +1792,6 @@ imlib_text_get_location_at_index(const char *text, int index,
 	return;
 	break;
      }
-   return -1;
 }
 
 char **
@@ -1843,14 +1842,14 @@ imlib_get_font_descent(void)
 }
 
 int
-imlib_get_maximum_font_ascent(Imlib_Font font)
+imlib_get_maximum_font_ascent(void)
 {
    CHECK_PARAM_POINTER_RETURN("imlib_get_maximum_font_ascent", "font", ctxt_font , 0);
    return ((ImlibFont *)ctxt_font)->max_ascent;
 }
 
 int
-imlib_get_maximum_font_descent(Imlib_Font font)
+imlib_get_maximum_font_descent(void)
 {
    CHECK_PARAM_POINTER_RETURN("imlib_get_maximum_font_descent", "font", ctxt_font , 0);
    return ((ImlibFont *)ctxt_font)->max_ascent;
@@ -2581,18 +2580,16 @@ imlib_filter_divisors(int a, int r, int g, int b)
    __imlib_FilterDivisors((ImlibFilter *)ctxt_filter, a, r, g, b);
 }
 
-void imlib_apply_filter( char *script, ... )
+void imlib_apply_filter(char *script, ...)
 {
-   IFunction            *func = NULL, *ptr;
    va_list               param_list;
    Imlib_Image           im;
    
-   
    __imlib_dynamic_filters_init();
    CAST_IMAGE(im, ctxt_image);   
    __imlib_DirtyImage(im);
    __imlib_DirtyPixmapsForImage(im);
-   va_start( param_list, script );
-   __imlib_script_parse( im, script, param_list );
-   va_end( param_list );
+   va_start(param_list, script);
+   __imlib_script_parse(im, script, param_list);
+   va_end(param_list);
 }
diff --git a/src/colormod.c b/src/colormod.c
index 2b9bd77..d88ba64 100644
--- a/src/colormod.c
+++ b/src/colormod.c
@@ -84,7 +84,7 @@ __imlib_DataCmodApply(DATA32 *data, int w, int h, int jump,
    DATA8   r, g, b, a;
    
    /*\ We might be adding alpha \*/
-   if (!(*fl & F_HAS_ALPHA))
+   if (fl && !(*fl & F_HAS_ALPHA))
      {
 	p = data;
 	for (y = 0; y < h; y++)