[Xenon]

you can also make new sortoptions to that pulldown:

edit template forumdisplay_threadslist

find the lines
<select name="sortfield">
<option value="title" $sort[title]>thread title</option>

and add this option for example
<option value="threadid" $sort[threadid]>thread startdate</option>

then in forumdisplay.php
find this:

Block Disabled:      (Update License Status)
Suspended or Unlicensed Members Cannot View Code.

and before the break; add case 'threadid':