Media and Plupload integration "file xy.jpg has been updated"

Hi there,

first of all, thanks for that awesome module :)
I am actualy running in a little problem using Media and Plupload integration together. Anything works just fine, except one thing.
When I am trying to upload a hugh Number of images, for example 54 files with about 300 MB, the upload process starts and after this I can edit the Media File Fields as expected.
But for some reason, after this step, the save function gets some trouble as you can see in my attached screenshot.
When i am closing the shown popup, there a no files uploaded ... :-/

I checked the apache error log, but cant find any error. There is no limit for max file size, or max file uploades in my php.ini that could produce this error.

Anyone got a idea how to fix that?