Research performed at La Trobe University concluded that an overpronated foot may be a risk factor for the development of chronic plantar heel pain (plantar fasciitis).
Source: Irving, D. B., Cook, J. L., Young, M. A., & Menz, H. B. (2007). Obesity and pronated foot type may increase the risk of chronic plantar heel pain: a matched case-control study. BMC musculoskeletal disorders, 8(1), 41.