Hi there StarLion,
Yes it is a wordpress standard page, not one I have coded myself. It's media.php which is located in the wp-includes folder of a standard wordpress install in case you're interested. And it's line 258. Here is that chunk of code in case you wanted to see it.
256 // Set artificially high because GD uses uncompressed images in memory
257 @ini_set( 'memory_limit', apply_filters( 'image_memory_limit', WP_MAX_MEMORY_LIMIT ) );
258 $image = imagecreatefromstring( file_get_contents( $file ) );
260 if ( !is_resource( $image ) )
261 return sprintf(__('File “%s” is not an image.'), $file);
263 return $image;
SpacePhoenix, I'll try to find out the hardware differences. But it's not my PC that it doesn't work on - it's a client. This is for a website I am developing. I have tested it on 3 of my owm machines (all different configurations and browsers) and he has tested it on both of his (One is a PC and the other is an iMac - it works on the Mac).
I know he is using Google Chrome - But I have also tested it with chrome so I don't think that's the problem. Both of us use the same (up to date) version.
That's all of the information I have for now - I will try to get more.