[Lynne]

You won't find any stylevars for them. It's all css. You can see them set here:

.threadbit .threadinfo {min-width:350px;width:62%;}
.threadbit .threadstats {width:12%;}
.threadbit .threadlastpost {
width:23%;}

Get firebug for firefox (or something similar for whatever browser you use) to easily see what css is affecting an area. If you need to change the above, either Search in Templates for the classes and change them, or change them in your additional css template.