I have downloaded 18.1 for Red Hat E, i encountered no problems with the package.
I'm now trying to install on fedora but some icd packages missing. please make sure that you have an 4.16 or above kernel installed.
And follow the new installation instructions for 18.1 Radeon Software for Linux Installation
I'm also download it for Ubuntu and extract it successfully. https://www2.ati.com/drivers/linux/ubuntu/amdgpu-pro-18.10-572953.tar.xz
Cant test the installation because I dont use ubuntu.
Cute animal pic
Yes, it looks like the archive has been corrected. It is now back to the correct size of 545MB.
Problem still occurs. Maybe some issue with some CDN network?
File I downloaded is size of 495 855 584 bytes (472 MB)