Iso-fludelone is a type of chemotherapy drug called an epothilone. Epothilones are drugs that attach to proteins in your body called "tubulins". Tubulins help cells to grow, and are found in both normal and cancer cells. When research animals with cancer were given the study drug, Iso-fludelone, the drug attached itself to "tubulin" and slowed or stopped the cancer cells from growing. Other types of epothilones have been tested in cancer patients and were found to be safe. A similar epothilone drug and other drugs called taxanes are currently approved by the FDA for treating certain types of cancers. The purpose of this study is to see the effects, good and/or bad, of this investigational drug, Iso-fludelone, on cancer. The term "investigational" means the study drug being tested has not been approved by the United States Food and Drug Administration (FDA) or other regulatory agencies. This study is the first time the investigators are using iso-fludelone in people. This is a Phase I study. In a Phase I study, the first people to receive the drug are given a fairly low dose.