Yes. I caught them (there were two!) in the act last year, they were able to climb up one of the wooden fence post braces and get over. Not sure what else to do... I don't love the idea of an electric fence and I don't think barbed wire would dissuade them (plus I don't want my home to look like a prison yard...) Maybe some of those spikes that you can get to keep birds off things?
Late in the summer, we can often hear what sounds like a cannon going off every 20 minutes or so from the ridge opposite. I spoke to a vineyard manager last year who said that it was her vineyard, the noise is supposed to scare the bears off. Not sure it works because she said that their usual 3-4 ton yield was reduced to 1/2 ton last year due to bear damage...