The activity on this address contains two transactions.
In the first transaction:http://blockexplorer.com/tx/ab2cfe25729628753fd93fda092114a52e91ed6639f0814946ee68dab461d19e#o1There were two inputs:
4 BTC from 1Fx52MgcatkkZgfxA14efbf1P67z1Lrjdz and
0.00939192 BTC from 1GvnDmbWJxXvr7EJFfxqeApwpn11grqwxf
and two outputs:
4 BTC to 1AmMNTEhmVQza9nAMrbZX1dffWV3SokAGY and the
0.00889192 sent to the address you are looking at
1JENFdPvzor3J8P2eNvNNfivTf66fq5hR6The difference between the inputs and the outputs of 0.0005 was given to the miner(s) who solved the block, which was block number 263926
The second transaction:http://blockexplorer.com/tx/1a3e1b9d40bff7bb548acc8f35fa96e5f0063ca22853e1983d94946aeba2308c#i56046383Had two inputs:
0.1178 from 13ke3qTu9dJpZzuosZRCprkukX9nkuC75q and the
0.00889192 from above from the address in question
1JENFdPvzor3J8P2eNvNNfivTf66fq5hR6and two outputs:
0.1178 to 1d4CDdhun9HarAitF5Vf37QHDj8Gnua3r and
0.00839192 to 17VryHyJLSFewUNqSbGm4Ke6i7Ui2ez2Vo
Again, the difference between the inputs and the outputs of 0.0005 was given to the miner(s) who solved the block, which was block number 263941
The behaviour is a bit "strange" but there you have it. Clear as mud?