I don't have a screencap for this, but it made me quite curious when I saw it...

In the first flashback of the episode, there are symbols on Locke's dinner tray. One symbol is an underscored 40. The others look like some sort of hieroglyphics.

Seemed very strange for a dinner tray. Anybody else catch it?

Those are all cattle brand markings, to go with the Western theme of the dinner tray.

do the brands mean anything?

So they were secretly slipping him Dharma food years before he was on the island... interesting. :p

It doesn't look like anything significant to me- there is an Arrow, which could be like the arrow station, but I think it is just a part of the cowboy theme-
Screencap-
http://gallery.lost-media.com/displayimage.php?pid=89922&fullsize=1

I don't know why I'm still stuck on this. (Saw it mentioned in an Easter Egg thread, as well).... But I found it interesting when I looked up some of the symbolism. I think you'll see some recognizable words and concepts...

Forty
The religious implications of the number forty are extensive. In Christianity, there are forty days of Lent, from Christ's forty days in the wilderness; forty days of resurrection, from Easter to Ascension. In the Old Testament, there are forty days of Moses on Mt. Sinai, and forty days of Elijah in hiding. There are forty days of the Deluge, and forty years of the Jews wandering in the wilderness. In pregnancy, movement in the womb after forty days means a boy. Purification - the flood was caused by forty days of rain. Jacob's embalming and mourning took forty days. Moses' life was divided into three periods of forty years.



Arrow
The arrow is a highly phallic image, evoking notions of piercing, penetrating masculinity, becoming the predominant symbol of the holy Father and of fathers in general. Related to this are the arrows of Cupid, the sharp ones of gold represent love, and the blunt ones of lead represent the dispelling of love. It is also associated with the rays of the sun, and with hunting. As the weapon of Apollo, it signifies the light of supreme power. Often paired with the HEART, and when it pierces through it is thought of as a symbol of conjunction. Has many other combinations: arrow with cross (affliction), horse-shoe (androgyne), fire (Christ).


Key
The key is the mechanism of the powers of opening and closing, and denotes liberation, knowledge, mystery, and initiation. SILVER keys usually refer to temporal power, while GOLD ones refer to spiritual power. In Christianity, it is the emblem of St Peter as the guardian of the GATE of HEAVEN, and the key may either confine or release. In addition, elements of secrecy and discretion coincide. Many Christian connections, the key to heaven, power to absolve sin, sign of fidelity, faith. When paired with a male dove, is the spirit opening the gates of heaven. Key hole is a vulva, phallic when key is placed inside.



Fish
The symbolic nature of fish is as inseparable from that of WATER as the two are connected in life. In psychology, water symbolizes the depths of the unconscious, and fish are the "live material from the depths of the personality, relating to fertility and the life-giving powers of the maternal realms within us" (Biederman, 131). Fish can also be symbolic of the faithful submerged in the waters of life. Yet fish are also cold-blooded, not driven by passion, and often represent such emotionless entities. In latin Christian symbology, the fish is related to Christ. Jesus told Peter (the first apostle), a fisherman by trade, that he would become a "fisher of men" if he were to follow Christ. For its connection with Christ it has also come to embody resurrection and immortality, as well as the savior. Often with ICTHS - Jesus Christ, son of god, savior.
Its character can be considered two-fold: by shape it becomes a bird of the nether regions, sacrifice between heaven and earth; and by its plethora of eggs it represents fecundity. Can be sexual (male) in a phallic sense with a frog (female). Can also be seen as wisdom, faith, freedom, wholeness and purity. Two fishes can be marriage, while three is baptism.

Found in this symbolism dictionary...

http://staff.fcps.net/mkearl/links/Online%20Symbolism%20Dictionary.htm