I think there is a node on the P2P network that is on the old fork, just started up today I think.
I first noticed that there was a chunk of blocks found that didnt make it to my wallet.
I then noticed the block numbers are all over the place recently:
It looks like it came online about 1.5 hours ago @ 56560 Wed Apr 09 2014 12:41:26 GMT-0400 (Eastern Standard Time)
57553 Wed Apr 09 2014 14:11:48 GMT-0400 (Eastern Standard Time) fd25508f2db3abfe507582be290872bff8bb07591c8c70d0fc1435db37512f16 >
56589 Wed Apr 09 2014 14:11:22 GMT-0400 (Eastern Standard Time) 194baa5682a12a52e9c5a5cf0a3439af6214c954010134c1d6d00686e86373fb >
57546 Wed Apr 09 2014 14:06:27 GMT-0400 (Eastern Standard Time) e7c2cbe0ed141b78e2a3d98cf1df966672fa73fe9df98fe5e4f177f14538641e >
57541 Wed Apr 09 2014 13:59:31 GMT-0400 (Eastern Standard Time) cff0e3dc6256e9a2b39497b14d5a494a28e5febdcc73efa560d3115b8b329870 >
57531 Wed Apr 09 2014 13:50:43 GMT-0400 (Eastern Standard Time) 2be246337e0ef8d22ac298993b2a17c7c81b8ad27b05e0c445ebaa84b5060369 >
57525 Wed Apr 09 2014 13:45:16 GMT-0400 (Eastern Standard Time) 66db425a3ce86c89224a79d652e4019c716f08b19d103b547eeaafa051722060 >
57522 Wed Apr 09 2014 13:41:17 GMT-0400 (Eastern Standard Time) 01634a14f43c1122a150aa1187e170956341d6dadb54abb497a6473a6077579c >
56569 Wed Apr 09 2014 13:19:31 GMT-0400 (Eastern Standard Time) 117df6815aa2261b135ea6fcc4a22357701fbe08f53c9a26cd08a5a4474e7772 >
56562 Wed Apr 09 2014 12:58:58 GMT-0400 (Eastern Standard Time) b05da6f802904123e9daf2ba5a58e41414530714b555664a8e6ed60b415401c0 >
56561 Wed Apr 09 2014 12:43:10 GMT-0400 (Eastern Standard Time) eb167d556ff8451f9fa53e975800ddf88e52053b72d0cd8f3adacc251f157773 >
56560 Wed Apr 09 2014 12:41:26 GMT-0400 (Eastern Standard Time) 5c61dfbbf5f0e098cbf89b4c87b18b502624d371d8e6e73b331b00b948caa666 >
just bumping this since it was the last post of the page and the following was posted right after... blocks from the wrong chain are still coming in...
57603 Wed Apr 09 2014 15:06:27 GMT-0400 (Eastern Standard Time) 6cd37b55bbd82b35491f725dd606dd6ef6df7ac8b880511890c4d52c0511d7ca >
56607 Wed Apr 09 2014 14:55:40 GMT-0400 (Eastern Standard Time) 53e78d088e39ef3a3eb9bcf1553332901bd6b3b8d896d590c727753fe92c7af5 >
56604 Wed Apr 09 2014 14:48:03 GMT-0400 (Eastern Standard Time) 85c0e683df2147c6ba0faffbc8af2884e449464587450382ffce56a3ecc30f7c >
56601 Wed Apr 09 2014 14:37:35 GMT-0400 (Eastern Standard Time) 943306ca66af76e91a85314a66ba7a451ab1b3fb84a1a5686dcdaec83bcea9f6 >57569 Wed Apr 09 2014 14:31:14 GMT-0400 (Eastern Standard Time) e22a67ee2443b7dbf8dafa9f1485c7959cd557aa24354c80cbb00c3de119f2c9 >
56596 Wed Apr 09 2014 14:27:18 GMT-0400 (Eastern Standard Time) a31aef9b5d91d09138f8494454e0b10dc4d2debe70d89aa1d07642f6ecd89dbf >57561 Wed Apr 09 2014 14:26:21 GMT-0400 (Eastern Standard Time) 14ab2f560e5b9b8d22de757afd629625d8fff882fabbb94913d0164e328fdd09 >
57553 Wed Apr 09 2014 14:11:48 GMT-0400 (Eastern Standard Time) fd25508f2db3abfe507582be290872bff8bb07591c8c70d0fc1435db37512f16 >
Thank you for the notification. Unfortunately we can't do anything about this situation, we'd need to know the IP of the node sending those blocks, we can only wait and hope whoever is running that pool/p2pool gets his act together.