Ok, I am SOOO sorry for the trouble, it wasn't a bug after all. There was something wrong with my .jar file. Sorry to every one.
Ok listen, (BTW, if I sound angry, its because I've had a bad day.) I know not to stand on blocks, and I know about the light level. I have never had this problem before. I have had lots of succesful wheat fields before. This only accured to me once I updated to 1.4. The seeds just started uprooting and when I re planted them, they just uprooted when another seed was put adjacent to them. Just try it.
To all who have commented. There is enough light, as you can see in the picture, there is glowstone right above the farm(which would take the farm well above light level 9). And this problem only appeared once I updated to Minecraft 1.4. I have never had this problem before this. And when I tried another world, two wheat seeds adjacent to each other still wouldn't stay in, so I have a strong believe that this is a bug in 1.4. Thanks
Ok, this is going to sound stupid, but how do I remove this bug report so I don't waist people's time?