[Lynne]

It is set at size="35" in the page source. The page is admincp/forum.php. So, you can change it in there on line 38:

PHP Code:

    print_input_row($vbphrase['title'], 'forum[title]', $forum['title']); 


function print_input_row has a default of 35, so pass something else:

PHP Code:

function print_input_row($title, $name, $value = '', $htmlise = true, $size = 35, $maxlength = 0, $direction = '', $inputclass = false) 


Just don't change it to anything larger than 100 since that is the database type - varchar(100)