phpThumb IE Problem

Hi I have a theme on wordpress usin开发者_JAVA技巧g phpThumb. And some images are not shown in IE7. It seems a problem with png transparency... What to do? Is there a parameter to pass to the script so that it will remove transparency and show pic even with less quality, but normal? Thanks a lot

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if you will have the same issue, disable imageMagick and also in phpThumb.class.php in line

1089 find

 return $WriteConvert; 

and replace with

return false;