Petty:
(adj)
trivial, unimportant, inconsequential, insignificant, minor, paltry, irrelevant, trifling, niggling, little, small

Petty-minded:
(adj)
petty, mean-minded, niggling, narrow-minded, trivial

Keep a watchful eye lest our days be whittled away by petty differences and minor infractions. I would rather listen to the cardinal trill out his morning welcome to the sun, thank you.