i'm very new to single speed/fixed. I just finished my first conversion a month or so ago. I had been using the original chain (read: old) but decided to replace it. Upon replacing, I cut the chain to about the same length as the original, but it ended up being slightly shorter. The result is that now the axle rests quite close to the bottom of the drop out. The nut is not hanging over the edge or anything, but I would say that the flange of it is right at the edge. now, i may be answering my own question here, but logic and physics lead me to believe that this is no big deal because weight from riding will always push upward on the wheel. So, unless i don't tighten the nuts enough and do some jumping, i should be ok, right?

As i said, i'm a newb on this stuff, so any thoughts you have a greatly appreciated. Sorry, no pic. i'm writing this late at night. i will post a pic tomorrow if folks think it's necessary.