odd. Do you water it frequently? If it is outside with light, water and fertilizer, it should be doing much better. If you say it is.. Check your plant for bugs, paticularly spider mites and scale.

It gets watered at least weekly, sometimes twice a week. During the summer months, it sits outside, so it gets watered more often. That said, I do know it has lived through at least one period where it was watered very little (by the previous owner). It used to look a great deal worse than this.

I've looked for bugs--nothing.