From a colleague:
I have, for my sins, begun to develop a project of a direct-to-digital edition of the Mishnah . . . Our basic problem right now is text/XML editors. At least for the Mac, even if the editor claims to be fully compliant with Unicode, any time you add tags to the text the word order on the line gets fouled up, which deeply complicates the problem of proof reading and error checking. So my question is,can you recommend a text editor that works with right to left fonts?