To what Snowbird is saying, the crown this rider wears is a different sort than Jesus wears. The white horse rider wears a laurel/wreath crown while Jesus is wears a diadem style crown.
I'm not dogmatic on it, but I personally believe this rider is NOT Jesus -- Here are a few of my reason --
There are four horsemen, they are given authority over four parts of the earth, to kill in four ways -
"And authority was given them over the fourth part of the earth, to kill with a long sword and with food shortage and with deadly plague and by the wild beasts of the earth. " - Revelation 6:8
To kill with a long sword = rider of the red horse
To kill with food shortage = rider of the black
To kill with deadly plague (or death) = rider of the pale horse
To kill with the wild beasts of the earth = rider of the white horse
The "wild beasts" in Revelation are definately nothing to do with Jesus but rather the governments of mankind
Another thing for me is that the elder John never identifies this white horse rider as Jesus, where in other places he is specific to indentify he is talking about the Lord.
This isn't the place for in depth discussion really but Jesus' olivet prophecy parallels musch of Revelation - including the seals - In that prophecy what are the four things that Jesus lists first -
The coming of false-Christs to mislead
Civil war
Food Shortages
Pestilence