I swapped out a head on a Pearl Snare of mine recently. I like Fiberskyn heads on that particular drum, and I've never had problems with those heads before. I took it to a Funk gig and thinking "oh its a new head so it should be fine" didn't take a spare snare. Oh dear!! When I fitted and tuned it everything seemed fine. On the gig it felt weird and sounded odd. Anyway It went during the second tune. Literally split from rim to rim right down the middle of the drum like I'd slashed it with a knife. Luckily the venue had a jam kit packed away in a corner so they dug the snare out. it was horrible, tuned like a teapot and Duct taped to death but it got me through.
I reckon that was a duff head. Spare snare next time!!