subsilver2 "poll options" must have a setting of 1-999 when editing a post
/subsilver2/template/posting_poll_body.html
<td class="row2"><input class="post" type="number" min="1" max="999" name="poll_max_options" size="3" maxlength="3" value="

{POLL_MAX_OPTIONS}" /></td>
should be
<td class="row2"><input class="post" type="number" min="0" max="999" name="poll_max_options" size="3" maxlength="3" value="{POLL_MAX_OPTIONS}

" /></td>