For original paper see N. J. Florous et al., ibid., vol.18, no.15, p.1663 (2006) and for comment see M. Antkowiak and R. Kotynski, ibid., vol.19, no.10, p.795 (2007). Florous et al. presented calculations of thermal sensitivity of photonic crystal fibers (PCFs) with elliptical holes. In their Comment Antkowiak and Kotynski compared these results with those obtained by them previously. They also included improved calculations of the thermooptics effect contribution to the polarimetric sensitivity of PCF and, on this basis, presented a critical analysis of the calculations given in both papers. Florous et al. reply to the comments regarding the thermooptical sensitivity calculations in birefringent photonic crystal fibers (PCFs). They address the major scientific differences in the propagation characteristics of the proposed PCFs between their original letter and the comments