Now I'm going out on a very long effing whim here....but IMO....it appears as though your plant has a problem in the root zone.... And the problem might be that the amount of soil being used is too great for the size of plant.... If so, and if you over watered, your roots at the bottom of the pot are staying wet and your soil doesn't dry out evenly....thus giving you the appearance of a problem.... It also appears as though your lighting is insufficient....

But like I first said....that's just a guess.... The troubleshooting form is in my sig....

CGI::::::