If lynx are brought back, they will mostly trouble Britain's burgeoning deer population.
I would point out five mostly troubling trends from 2010 that will probably define and plague the Middle East for the year ahead.
Celtic cemented their place at the top of the Scottish Premiership with a routine and mostly trouble-free 2-0 win over Motherwell.
A day after his record-tying 63 staked him to a two-shot lead over Scott Verplank (74), Woods held back the field at a toasty Southern Hills by making two birdies and one bogey in a safe and mostly trouble-free round.
Other sociologists – Kathryn Edin, for example – have found that single mothers often get help under the table from their children's fathers, but Arleen, Doreen and Doreen's adult daughter Patrice get mostly trouble from men, who are variously abusive, addicted, vanished or in prison.
Some developers complained that early builds of Lion were filled with bugs and bogged down by slowness, but this final version feels snappy and mostly trouble-free.
As counting began across the country, early indications from observers were that voting was mostly trouble-free and there were only isolated reports of irregularities.
Voting in the historic election was mostly trouble-free, despite religious tensions fanned by Buddhist nationalists whose actions intimidated Myanmar's Muslim minority in the run-up to the poll.
For the most part, OS X Mavericks has offered mostly trouble-free updates for the hackintosh community.
But mostly, I'm troubled by the way the great intellectual traditions of Catholic and Protestant churches alike are withering, leaving the scholarly and religious worlds increasingly antagonistic.
