Helpcase add some bytes to images files, does not display them in pages.

Hi, I’m creating help files for my project, but the images loaded using the Images Manager does not display in the help pages. I compared the original image file and the file published: the files are 3 bytes larger, and the extra bytes are hex EF BB BF added at start of the file. The file is then an invalid JPG or PNG file, even Windows PhotoViewer shows a message indicating the file is invalid.

I read some other post from people complaining about images not displaying in the help… but no answer yet. Any ideas?

[SOLVED]
I found a solution: for images to work I must load it ONLY to _images folder. If I put them on any other folder, they don’t work. In the _images folder, every image work as expected.