This question has been answered by zwhzwh. See the first response.
Can anybody else, out there, confirm this issues with Cyrillic letters and/or has a solution?Other multibyte charsets must have this problem, too -- Chinese, Japanese, Devanagari, etc.
I believe that these are coming from the tvprops lexicon file for the MIGx lexicons, so you can probably edit them in the Lexicons tool to match whatever character set your browser is using.Ok, I replaced all Russian words in this file with their English oiginals. And what can you recommend about receiving unreadable one-byte decoded words when trying to edit a line in a MIGX table? On the pic you can see what I receive: