I've been stuck on the same block (block 902273) even after the couple of new wallets.
Even with an empty wallet and the right europecoin.conf and deleted peers.dat.
My last lines of debug code:
04/16/16 15:42:34 ProcessBlock: ORPHAN BLOCK, prev=615b707af96deea71a1f
04/16/16 15:42:34 ProcessBlock: ORPHAN BLOCK, prev=cd8e3f77595eaa7876f0
04/16/16 15:42:35 ProcessBlock: ORPHAN BLOCK, prev=18de7d35e65cfd1fe0f3
04/16/16 15:42:35 ERROR: CheckProofOfStake() : INFO: read txPrev failed
04/16/16 15:42:35 WARNING: ProcessBlock(): check proof-of-stake failed for block 416316cd5356c3ae42b0fede7e9ac7fc29e8f444265bc273d11f3eb69327ffc5
04/16/16 15:42:35 ERROR: ProcessBlock() : AcceptBlock FAILED
04/16/16 15:42:35 ProcessBlock: ORPHAN BLOCK, prev=589feeccfc3b7e1c5fa1
04/16/16 15:42:35 ProcessBlock: ORPHAN BLOCK, prev=842779a280594ef50f54
04/16/16 15:42:36 ProcessBlock: ORPHAN BLOCK, prev=a6038ee42d5c04bc3e3f
04/16/16 15:42:36 ProcessBlock: ORPHAN BLOCK, prev=0b74c6006b50a57cb072
04/16/16 15:42:36 ProcessBlock: ORPHAN BLOCK, prev=d05ee60248f38ba519a0
04/16/16 15:42:37 ProcessBlock: ORPHAN BLOCK, prev=4acdfc36c6eb54b702eb
04/16/16 15:42:37 ProcessBlock: ORPHAN BLOCK, prev=f6da70a995b98d1c9794
04/16/16 15:42:37 ProcessBlock: ORPHAN BLOCK, prev=8b7624dad644ca75b8e9
04/16/16 15:42:38 ProcessBlock: ORPHAN BLOCK, prev=ecd9834571e9e61019c7
04/16/16 15:42:38 ProcessBlock: ORPHAN BLOCK, prev=72497f1a73713d1817f2
04/16/16 15:42:38 ProcessBlock: ORPHAN BLOCK, prev=ba19effd5c45563ca34a
04/16/16 15:42:38 ProcessBlock: ORPHAN BLOCK, prev=b8ac886c0d74ec06b23a
04/16/16 15:42:39 ProcessBlock: ORPHAN BLOCK, prev=0a742d5a05af1f1473e3
04/16/16 15:42:39 ProcessBlock: ORPHAN BLOCK, prev=cb0ae5b03b14d7b157bf
04/16/16 15:42:39 ProcessBlock: ORPHAN BLOCK, prev=fe61cb86c5c5df952373
04/16/16 15:42:40 ProcessBlock: ORPHAN BLOCK, prev=02684cee07274b626ca8
04/16/16 15:42:40 ProcessBlock: ORPHAN BLOCK, prev=8b671817f359ee70148f
04/16/16 15:42:40 ProcessBlock: ORPHAN BLOCK, prev=c6a51622b5d12507fc25
04/16/16 15:42:41 ProcessBlock: ORPHAN BLOCK, prev=b674f2bce93d6364aa3a
04/16/16 15:42:41 ProcessBlock: ORPHAN BLOCK, prev=e636e4a153fb0e7ec12a
04/16/16 15:42:42 ProcessBlock: ORPHAN BLOCK, prev=856892761a7adf04d13c
04/16/16 15:42:42 ProcessBlock: ORPHAN BLOCK, prev=a7ad89f8a3f370267859
04/16/16 15:42:42 ProcessBlock: ORPHAN BLOCK, prev=3b60f6a43c90efb509fe
04/16/16 15:42:42 ProcessBlock: ORPHAN BLOCK, prev=6f967a65b60f900bb2c2
04/16/16 15:42:43 ProcessBlock: ORPHAN BLOCK, prev=478fa1a4ccc138eb9dbe
04/16/16 15:42:43 ProcessBlock: ORPHAN BLOCK, prev=2ae3c5c57165522ef659
04/16/16 15:42:44 ProcessBlock: ORPHAN BLOCK, prev=7dd574f167efffdb81aa
04/16/16 15:42:44 ProcessBlock: ORPHAN BLOCK, prev=4a0f21d2bf8359894812
04/16/16 15:42:44 ProcessBlock: ORPHAN BLOCK, prev=3f7e9fa12d4551fdd8b8
04/16/16 15:42:45 ProcessBlock: ORPHAN BLOCK, prev=8a2feb63f2999c2893a4
04/16/16 15:42:45 ProcessBlock: ORPHAN BLOCK, prev=1f38bbe95b925f3c26a1
04/16/16 15:42:45 ProcessBlock: ORPHAN BLOCK, prev=4a258c386680add4a625
04/16/16 15:42:45 ProcessBlock: ORPHAN BLOCK, prev=83e45d24bfa3b1969749
04/16/16 15:42:46 ProcessBlock: ORPHAN BLOCK, prev=6c88c88ffd86836947d4
04/16/16 15:42:46 ProcessBlock: ORPHAN BLOCK, prev=0d9580d09ce2ed1fbb0b
04/16/16 15:42:46 ProcessBlock: ORPHAN BLOCK, prev=54fdd9f78332ff1222a9
04/16/16 15:42:47 ProcessBlock: ORPHAN BLOCK, prev=b6af7d850925ec379dcc
04/16/16 15:42:47 ProcessBlock: ORPHAN BLOCK, prev=013361aac356e49317bf
04/16/16 15:42:47 ProcessBlock: ORPHAN BLOCK, prev=595a98edc7a8c085266d
04/16/16 15:42:47 ProcessBlock: ORPHAN BLOCK, prev=74cb23964f6980a1c125
04/16/16 15:42:48 ProcessBlock: ORPHAN BLOCK, prev=1af71b44820c74319724
04/16/16 15:42:48 ProcessBlock: ORPHAN BLOCK, prev=c140ad7166f557e2be56
04/16/16 15:42:48 ProcessBlock: ORPHAN BLOCK, prev=25e78cd72f0577883773
04/16/16 15:42:49 ProcessBlock: ORPHAN BLOCK, prev=6af5679fe21f19204c91
04/16/16 15:42:49 ProcessBlock: ORPHAN BLOCK, prev=0ab5deb09c6d5a09f98c
04/16/16 15:42:49 ProcessBlock: ORPHAN BLOCK, prev=d864eb75b6b2eec84174
04/16/16 15:42:50 ProcessBlock: ORPHAN BLOCK, prev=11b8aa8c9134ce154d8b
04/16/16 15:42:50 ProcessBlock: ORPHAN BLOCK, prev=d1ec2eddd83be4382856
04/16/16 15:42:50 ProcessBlock: ORPHAN BLOCK, prev=83e83bdab78d281a61a7
04/16/16 15:42:51 ProcessBlock: ORPHAN BLOCK, prev=3682ef8e053b8498841f
04/16/16 15:42:51 ProcessBlock: ORPHAN BLOCK, prev=77e72beabb259f24512c
04/16/16 15:42:51 ProcessBlock: ORPHAN BLOCK, prev=4a69e5adb148fa2c55dc
04/16/16 15:42:52 ProcessBlock: ORPHAN BLOCK, prev=a0ee74834197e3f3b6ca
04/16/16 15:42:52 ProcessBlock: ORPHAN BLOCK, prev=ea13e9accd1ff625dbc6
04/16/16 15:42:52 ProcessBlock: ORPHAN BLOCK, prev=86d5296ef86da34ef12d
04/16/16 15:42:53 ProcessBlock: ORPHAN BLOCK, prev=9d69a7908a5bc2bd21ea
04/16/16 15:42:53 ProcessBlock: ORPHAN BLOCK, prev=d0f848cfeb1bfdff26e2
04/16/16 15:42:53 ProcessBlock: ORPHAN BLOCK, prev=c3af37e6e2ea625c2b37
04/16/16 15:42:54 ProcessBlock: ORPHAN BLOCK, prev=b7bf298e5048e32f495b
04/16/16 15:42:54 ProcessBlock: ORPHAN BLOCK, prev=d4e17a05b2ca0075582b
04/16/16 15:42:54 ProcessBlock: ORPHAN BLOCK, prev=420d60da3f1a407c0b85
04/16/16 15:42:55 ProcessBlock: ORPHAN BLOCK, prev=e7d19844b7bdf86385b9
04/16/16 15:42:55 ProcessBlock: ORPHAN BLOCK, prev=ad7a8a602cbbac2e6bca
04/16/16 15:42:56 ProcessBlock: ORPHAN BLOCK, prev=84d5f9151313227a9348
04/16/16 15:42:56 ProcessBlock: ORPHAN BLOCK, prev=2c0436b8fa102a29097a
04/16/16 15:42:56 ProcessBlock: ORPHAN BLOCK, prev=68f9c1179f883f804327
04/16/16 15:42:56 ProcessBlock: ORPHAN BLOCK, prev=afe9db0649efcbfa4bae
04/16/16 15:42:57 ProcessBlock: ORPHAN BLOCK, prev=9ebe2459091e5998a158
04/16/16 15:42:57 ProcessBlock: ORPHAN BLOCK, prev=d0006979894cb3143b47
04/16/16 15:42:58 ProcessBlock: ORPHAN BLOCK, prev=ed4ee625d8275dc4b8be
04/16/16 15:42:58 ProcessBlock: ORPHAN BLOCK, prev=b09b8d99f9ffe0870cc9
04/16/16 15:42:58 ProcessBlock: ORPHAN BLOCK, prev=38b37e1e983f6ee8cc36
04/16/16 15:42:58 ProcessBlock: ORPHAN BLOCK, prev=7bd5470969fc573ba990
04/16/16 15:42:59 ProcessBlock: ORPHAN BLOCK, prev=836c5b652cdde474653a
04/16/16 15:42:59 ProcessBlock: ORPHAN BLOCK, prev=7c0b64adcd6426be53b4
04/16/16 15:42:59 ProcessBlock: ORPHAN BLOCK, prev=934e00b2bb05d40676b0
04/16/16 15:43:00 ProcessBlock: ORPHAN BLOCK, prev=7a1e53d735c66fcdebd1
04/16/16 15:43:00 ProcessBlock: ORPHAN BLOCK, prev=521bfec38e2c2f20dc84
04/16/16 15:43:01 ProcessBlock: ORPHAN BLOCK, prev=a8ce2f0cd0d4d04c2fd4
04/16/16 15:43:01 ProcessBlock: ORPHAN BLOCK, prev=6f9d07733854699440d4
04/16/16 15:43:01 ProcessBlock: ORPHAN BLOCK, prev=4c6ef72d3e890a564a24
04/16/16 15:43:02 ProcessBlock: ORPHAN BLOCK, prev=3f9a18546865401da0ee
04/16/16 15:43:02 ProcessBlock: ORPHAN BLOCK, prev=7eba235c910c6e2fbeb5
04/16/16 15:43:02 ProcessBlock: ORPHAN BLOCK, prev=194479994083ab8cc108
04/16/16 15:43:03 ProcessBlock: ORPHAN BLOCK, prev=a3f39934bdb3c63aa54f
04/16/16 15:43:03 ProcessBlock: ORPHAN BLOCK, prev=2053704559b5d64d9a2c
04/16/16 15:43:03 ProcessBlock: ORPHAN BLOCK, prev=1be11130441510a6688e
04/16/16 15:43:03 ProcessBlock: ORPHAN BLOCK, prev=9c52c5b58fbcb9e0cf72
04/16/16 15:43:04 ProcessBlock: ORPHAN BLOCK, prev=94860b6cb289bfa69425
04/16/16 15:43:04 ProcessBlock: ORPHAN BLOCK, prev=a85bc1b81ffb74d652c1
04/16/16 15:43:05 ProcessBlock: ORPHAN BLOCK, prev=667d3d8dd46aca3c5114
04/16/16 15:43:05 ProcessBlock: ORPHAN BLOCK, prev=c551ab8a98345fb2fb13
04/16/16 15:43:05 ProcessBlock: ORPHAN BLOCK, prev=511a251977bdc6ee56f5
04/16/16 15:43:06 ProcessBlock: ORPHAN BLOCK, prev=296e0a355981b7f020ea