Image Upload Size

So this is an odd one, getting an error that the image upload size is to large.  It seems the script is asking for less that 10 MB size for an image - however I have it set server side 50MB, 50MB on Joomla and Joomla sees it as 50 MB.  Thoughts?
Using the AJax Uploader.
 

Hi,
If you upload large picture, you will need more CPU to process it (resize or adding watermark). With memory 128MB, i don't think it's enough for processing large picture. At least, you need 512MB memory in this case
Thanks
Dam