After installing this plugin to my blog, I got many errors to upload media.
Every time I try to upload an image from the publisher, it took me years and finally told me that there was a mistake to upload photos.
I disable all plugins and I was activating one by one and test media upload. When I turn on this plugin, problems began again.
Today, I have removed from my site and all loads for multimedia works 100%.
Thanks anyway, this plugin reduces image very well.
Maybe I'll install it later again.