I get:
Function name must be a string on line 1587 in /home/gtammcom/public_html/vbforum/includes/class_bbcode.php
#0 /home/gtammcom/public_html/vbforum/includes/class_bbcode.php(1042): vB_BbCodeParser->parse_array(Array, 4096, 262144, 0)
#1 /home/gtammcom/public_html/vbforum/includes/class_bbcode.php(563): vB_BbCodeParser->parse_bbcode('[URL="http...', 4096, 262144, 0)
#2 /home/gtammcom/public_html/vbforum/includes/class_bbcode.php(477): vB_BbCodeParser->do_parse('[URL="http...', 0, 4096, 131072, 2048, true, false, NULL, false, 262144)
#3 /home/gtammcom/public_html/vbforum/includes/functions_newpost.php(980): vB_BbCodeParser->parse('[URL="http://ww...', 'signature')
#4 /home/gtammcom/public_html/vbforum/newreply.php(509): process_post_preview(Array, 0, NULL, NULL)
#5 {main}