Why does the .deb for 5.3.4 fail dependencies on 16.04

Hi,

Why does the .deb for 5.3.4 fail dependencies on 16.04? Am I doing something wrong, or is this release not ready yet?

Thanks,

Chris.

Installed v5.3.4.2 on Mint 18 yesterday without problem. Just now, on Ubuntu 16.04, removed v5.3.2.2 & installed v5.3.4.2 and help pack without any issues.