This problem has plagued me for the past week. I've tried everything mentioned here and none of the posted solutions seem to fix my problem. I'm not sure why this is happening as it happened all of a sudden. My server environment hasn't changed (I verified this with my host).
What happens is when I attempt to upload images, the "crunching" text appears, and the loading bar reaches the end ... and just stops. This forces me to have to use the browser uploader, which is slower and not as efficient for uploading multiple images.
Can anyone help me with this???