I noticed that some upload submissions didn't have images in them.

When listing submissions, the photo area is blank.

When viewing the full submission, there's only the word 'photo' shown.

When attempting to 'View image' in the browser, it loads an image URL but the image is not found.

It appears that some people were attempting to upload .bmp images, which do not display in the browser, but the actual (numbered) image file is nowhere in the images folder.

I've disabled every file extension valid for upload in Joomla except gif/GIF, jpg/JPG, png/PNG, and still we are getting submissions with no image available.

EDIT:  I've just attempted to upload a .bmp file myself and received a number of PHP error messages that the image resource wasn't valid... HOWEVER, the hotornot component STILL tells me the upload was a SUCCESS and the description appears in the back end (without a valid image file associated).

In the case of an invalid image filetype submission, shouldn't it return me to the upload dialogue?

Where should I look to sort out this issue?

The site in question is located at http://sheinspiresme.ca. Click on "View the Nominees" to see the submission list.