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Are these conflictiing:
########### 1

define("ICONSTYLE", "");
define("COMMENTLINK", LAN_THEME_2);
define("COMMENTOFFSTRING", LAN_THEME_3);
define("PRE_EXTENDEDSTRING", "<br /><br />[ ");
define("EXTENDEDSTRING", LAN_THEME_4);
define("POST_EXTENDEDSTRING", " ]<br />");
define("TRACKBACKSTRING", LAN_THEME_5);
define("TRACKBACKBEFORESTRING", " | ");

########## 2

$COMMENTSTYLE = "
<table style='width: 100%;' cellspacing='10'>
<tr>
<td style='width: 30%; text-align: right; vertical-align: top;'><span class='mediumtext'><b>{USERNAME}</b></span><br /><span class='smalltext'>{TIMEDATE}</span><br />{AVATAR}<span class='smalltext'>{REPLY}</span></td>
<td style='width: 70%;'>
{COMMENT} {COMMENTEDIT}
</td>
</tr>
</table>
";