I got a problem with the synchronization of the wallet. Last Block downloaded is 195557 of 199762.
Is this a known issue? Or what can I do to solve it?

REORGANIZE: Disconnect 5926 blocks; dfec7a7b390e3311e6b7..c5602f180abfad456d3b
REORGANIZE: Connect 5788 blocks; dfec7a7b390e3311e6b7..4043f93f2ea225d7cf01
ERROR: DisconnectBlock() : WriteBlockIndex failed
ERROR: Reorganize() : DisconnectBlock aeb85f43b72914b0d255 failed
InvalidChainFound: invalid block=d5fb801efa66d2bbdb2e height=196516 trust=196691115297 date=06/12/14 03:40:39
InvalidChainFound: current best=c5602f180abfad456d3b height=195557 trust=194850268516 date=06/12/14 17:55:52
ERROR: SetBestChain() : Reorganize failed
ERROR: AcceptBlock() : AddToBlockIndex failed
ERROR: ProcessBlock() : AcceptBlock FAILED
received block 15f2c7d488ffef1f7133
>>> CheckStakeKernelHash: nTimeWeight = 1469904
>>> CheckStakeKernelHash: passed GetKernelStakeModifier
Postponing 1098 reconnects
REORGANIZE
REORGANIZE: Disconnect 5926 blocks; dfec7a7b390e3311e6b7..c5602f180abfad456d3b
REORGANIZE: Connect 5788 blocks; dfec7a7b390e3311e6b7..4043f93f2ea225d7cf01
Is there somebody how can make any chocolate of the above error log messages?You can just reinstall the wallet ... and don't forget to backup