I got this working on 4.1.3, the functionality is still working but it does not display the user option in the profile edit options. To fix this do the following:
Edit template "modifyoptions_postbitmode" and replace the contents with:
Code:
<div class="blockrow">
<label for="sel_threadedmode">$vbphrase[post_display_mode]</label>
<select name="postbitmode">
<option value="0"<if condition="!$vbulletin->userinfo['postbitmode'] OR $vbulletin->userinfo['postbitmode'] == 0"> selected="selected"</if>>$vbphrase[use_forum_default]</option>
<option value="1"<if condition="$vbulletin->userinfo['postbitmode'] == 1"> selected="selected"</if>>$vbphrase[postbit_top]</option>
<option value="2"<if condition="$vbulletin->userinfo['postbitmode'] == 2"> selected="selected"</if>>$vbphrase[postbit_left]</option>
</select>
<p class="description">$vbphrase[choose_post_display_mode]</p>
</div>
And edit plugin "Optionen Anzeigen" replace with:
Code:
$templater = vB_Template::create('modifyoptions_postbitmode');
$template_hook['usercp_options_other'] .= $templater->render();