Have a rather strange situation -- I'm processing uploaded images with 
Imagemagick. The first two commands we run on the uploaded images are ones to 
crop and scale the original:

$command1 = "/usr/local/bin/convert $origfilename -crop " . $realWidth . "x" . 
$realHeight . "+" . $xStart . "+" . $yStart." -density 72x72 $filename";

$command2 = "/usr/local/bin/convert $filename -scale 800x600 -quality 45 -blur 
2 $filename";

Then we scale that modified image to make a thumbnail as well:

$command3 = "/usr/local/bin/convert $filename -scale 100x75 $thumb";

Occasionally, we get images that have very large thumbnails, in size. We're 
talking like 40kb, when most thumbnails that get generated are about 3-5kb. Any 
ideas on why this might be happening? I've confirmed that the dpi for the 
thumbnail images is 72x72. What else should I be checking?

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