Soon, I'll quit soon. I can't stand imagining that Crisis is on its way to becoming the unique "unofficially official" fourth Chrono game. I'm going to finish coding Mt Woe and then I'll go back to work on Crimson Echoes directly, before the end of Prophet's Guile's development. After that point, Prophet's Guile will or will not get finished; in any case, it won't get finished by me. Crimson Echoes has been time-crashed for too long. I'm certainly not blaming anything or anyone for the slump in both projects, but something simply has to be done for CE. If only one project out of the two has to be completed, it might as well be CE.
As for corruption issues: make a copy of the ROM in Windows everytime that you save TF. Everytime. This is the safest solution.