Why are Mono apps fragile?

[Nadeem Bitar]

I am starting to be concerned about the fragility of mono based apps.
More and more I am relying on apps that are mono-based but these apps
break quite often.
For example i can't access my notes because an update broke tomboy, I
can't seem to figure which mono library exactly broke it.  Similarly
f-spot has been broken on my machine for some time now.
It's a shame that these great apps are written in mono.