Text element only showing in Firefox, not safari or chrome

me and my friend are making this site and in firefox this certain text area is showing fine, but in safari and chrome it doesnt, it just is completely hidden.

http://skincache.com/request_reply

We have no idea why.

Thank开发者_如何学C you

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You should inspect your code with Chrome Dev Tool or Firebug, because I can see this:

#request_reply ul li {
  height: 0px;
}

Disabling it solves the problem.