If you are having trouble with the Image Selecting and Cropping jquery tool in your web development turning your png black - there is an easy fix for this. Presuming you don't need to scale your larger image (as has been the case in the implementations I have used - dont forget there is still a file size max) you can comment out one line to fix this bug.

You see, when you take a png transparent image and resize it - you lose the transparency in the transformation. So - simply comment out the line that resizes which is:

$uploaded = resizeImage($large_image_location,$width,$height,$scale);

Comment out by making that line as follows:

//$uploaded = resizeImage($large_image_location,$width,$height,$scale);

This line can be found after determining there are no errors as it is uploading the file towards the bottom of the script with the functions.

If you have any other ideas on squashing this bug - share in the comments below... Otherwise, I hope this helps - good luck to you!