I'm not trying to annoy you or anything

I put the fix in when I first read it, which would have been about 4 days ago, after the last person registered in the forum, hence my thought that it may be that that caused my problem, I have since put it back in.
</td>
<td><font size=2><b>$txt[497]:</b></font></td>
<td><font size=2><input type=text name="cookielength" size=4 value="$Cookie_Length">
<td><font size=2><b>$txt[508]:</B></font></td>
<td><font size=2><input type=checkbox name="cookieneverexp"></font></td> </font></td>
<td align=center colspan=2><input type=submit value="$txt[34]"></form></td>
</tr>
</table>
Three people have registered since the upgrade, so I haven't always had the problem.
I have made other tweaks to my scripts, mostly english.lng and am trying to rack my brain what I have done where that may have caused it.
The changes in the english.lng were changing YaBB to the name of my forum (txt: 7, 11, 13, 14, 15, 208, 209, 347, 424, 520, 569, 570, 709, 611, 645, 671, 677, 682 & 697)