This is just a bug fix necessary after I let a few bugs slip through along with all the new features in v0.16.
If you are using v0.16 (or even a v0.16a dated before 28th July), please use this one instead. Sorry this is necessary.
And, to make it worse, the binaries are now a couple of commits ahead of even this nominal level. More bugs... So, if building from source, please use trunk.
Mac users should still use the 32bit Carbon based version. The 64bit cocoa is getting better but still not quite ready IMHO. Otherwise, the choice should be obvious, if not, please contact us via the usual channels.
Users of recent Fedora (and possibly others) may need to install TopIcons, a gnome-shell-extension necessary because gnome 3.28 has left out such support. Please see the tomboy-ng wiki. https://wiki.gnome.org/Apps/Tomboy/tomboy-ng/BugsAndIssues
Davo