Throughout the study, especially during Cycles 1 and 2, patients will undergo frequent blood and urine tests, procedures to assess safety including heart function, and tests to assess the course of the patient's illness. The duration of treatment will depend on adverse effects and whether there is benefit from the treatment. Two weeks after the last dose of the study drug, patients are required to return to the study site for follow-up assessments. Patients will take JNJ-26483327 capsules by mouth twice a day throughout treatment. Patients will be allowed to continue at the same dose level as long as there are no unacceptable side effects, and there is benefit to the patient based on the study doctor's evaluations.