Index: imageapi_gd.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/imageapi/imageapi_gd.module,v
retrieving revision 1.13.2.7
diff -u -p -r1.13.2.7 imageapi_gd.module
--- imageapi_gd.module	17 Apr 2009 00:15:21 -0000	1.13.2.7
+++ imageapi_gd.module	21 May 2010 11:57:57 -0000
@@ -246,7 +246,7 @@ function imageapi_gd_create_tmp($image, 
     // Grab transparent color index from image resource.
     $transparent = imagecolortransparent($image->resource);
 
-    if ($transparent >= 0) {
+    if ($transparent >= 0 && $transparent < imagecolorstotal($image->resource)) {
       // The original must have a transparent color, allocate to the new image.
       $transparent_color = imagecolorsforindex($image->resource, $transparent);
       $transparent = imagecolorallocate($res, $transparent_color['red'], $transparent_color['green'], $transparent_color['blue']);