As the man from Mars used to say, "I am only an egg". I tried looking at the proposed change to the showthread template, and when I unzipped the attachment mentioned in the OP, I saw two lines that had "extended ASCII" characters:
Code:
<td width="18%" bgcolor="#DFDFDF" valign="top"><normalfont><b>??? ?????:</b></normalfont>
and
Code:
<input type="submit" class="bginput" value="?????????"
accesskey="s" tabindex="3"></normalfont> </td>
Those are because the OP was displaying text in a Russian Font I guess? They should be something like "Your reply" and "Submit reply"?