For those using PHPmotion with release version 3.5 - Rev 115, please check for the `images` folder:

/var/www/html/addons/albums/images

I was using this release and when I tried to upload images as media, seems that only thumbnails appeared. Eventually the picture wasn't uploaded since the `images` folder is missing under the `albums` folder. If you a missing as such, just create the `images` folder and the image upload will work just fine.