had a couple of incidents over the last two weeks, one umpire calling no ball from square leg for the keepers gloves being infront of the stumps (not catching it infront, just the hands being over an imaginary line past the stumps)
also, in our league, the fielding restrictions state that you are allowed a maximum of 2 fielders outside of the 30 yard circle for the first ten overs, square leg umpire called no ball mid delivery because we only had one man out of the ring, worst thing was that their best bat who was on zero at the time chipped it to cover who dropped it (claiming he was put off by the call haha), umpire had to apologise, dead ball called, the batsman made 50 but we still won.