When using mdtool in terminal, I stumble upon what looks like this bug fixed in 2012.
mono --version says 3.8.0, MonoDevelop is 3.0.5 and Xamarin Studio is 5.4 (all released long after 2012), but I also have old versions of Mono that I used to build from source.
How to know what version of mdtool I am running?
I tried mdtool version, mdtool -version, mdtool --version, none works.