I'm getting the following error in the debug.log at startup. The splash windows shows it stuck at the "Activating best chain..." stage.
2016-03-22 11:29:31 UpdateTip: new best=00000000000000b9f7b4bfaee1287b3e51fd534cdb30f42c482dfff7f714f6d3 height=237053 log2_work=70.080714 tx=18132304 date=2013-05-20 12:10:02 progress=0.072438 cache=32.1MiB(25880tx)
2016-03-22 11:29:31 ERROR: CheckBlock(): hashMerkleRoot mismatch
2016-03-22 11:29:31 ERROR: ConnectTip(): ConnectBlock 00000000000000afe58811aea548dac4d6f4fd8c9c2b88836c84170ab52b03b8 failed
Are there any files I should delete/reset to get this resolved?