Unicode experts, I just failed to correctly import .tex file into lyx, more precisely while \'a gets correctly translated into รก, \'i is not translated and you see only ERT with the \'i.
Looking into unicodesymbols file the difference seems to be clear: 0x00e1 "\\'{a}" "" "mathalpha" "\\acute{a}" # LATIN SMALL LETTER A WITH ACUTE 0x00ed "\\'{\\i}" "" "mathalpha" "\\acute{\\imath}" # LATIN SMALL LETTER I WITH ACUTE Changing "\\'{\\i}" into "\\'{i}" helps and tex2lyx converts \'i in the file correctly. Actually the same additional \\ are used for all "i"s. This is a typo ot there something deeper behind? Apart from that tex2lyx seems not to translate \dots (again ERT) and *\footnote{} is converted into footneote inset but '*' remains plainly in the text. Don't know if this solvable or there are catches why this can't be done. Pavel