Signing a PDF file containing an image causes distortion to the image (using --clearsign).
```
gpg --clearsign --output='dices - signed with gpg.pdf' 'dices - unsigned.pdf'
```
{F2230401}
File signed with distorted image.
{F2230400}
Original file, unsigned and undistorted.
{F2230399}
PNG used to create the unsigned file. Comes from Wikimedia, so it is ok to distribute.
{F2230398}
Blank PDF used to add the image //dices.png// to.