Here are my comments and suggested edits:
-I'm not sure if it's just me, but the blue background looks very choppy. I'm not sure what could have caused that.
-What about playing tiles adjacent to a veto tile? That should probably be mentioned in the rules as well. I'm going to vote that a newly drawn tile may not be placed next to a veto tile in play.
==Preperation==
"At the beginning of the game, take one less veto tiles than
there are the number of players and set
these them to one side.
Shuffle the new tiles with the other tiles."
==Obtaining Veto Tiles==
"When a player completes a lap around the scoreboard (crosses the 50 points mark)
,(comma) they may claim a Veto tile and place it in front of them."
-Using the term "may", does that mean it is optional to claim a veto tile?
"A player is not allowed to have more than one
unplaced Veto tile
in front of them at any given time."
==Placing a Tile==
"The tiles are place
d in accordance to the normal rules of Carcassonne."
"The farm
s on this tile
are is continuous connected under the bridge.
"A player with a Veto tile may use it when an opponent finishes their placement of a tile, but before that player places a follower or scores."
-I don't think that it should be before placement of the follower. If that's the case, then I'd play a follower with the land tile as I'm putting it down!
"The Vetoer (the player who is playing the Veto tile) declares out loud that they
will are veto
ing the tile placement,
and removes replaces the just placed tile
and places with their Veto tile
in its place."
"The
player whose turn it current is and who was just vetoed opponent must place their tile elsewhere in accordance to the
normal rules of Carcassonne."
-This paragraph should be added to the previous paragraph.
"The Veto tile is then set aside and can be claimed by another player when they make another loop around the
score board."
"If the player who is being vetoed is also in possession of a veto tile
,(comma) they have the option to counter veto."
-I'd also move this paragraph up one paragraph.
==Score==
"A city with part of its
walls wall bordering a Veto tile is not completed."
"As a result, any mayors in the city count as 0
towards scoring when determining the majority."
===EDIT===
Here's a PDF for the Veto tiles:
http://gwommy.tripod.com/carcassonne/VetoTiles.pdf