Well after 2 days of making the code changes the visitor counter is no less then before, where in fact the count is higher then the day before the code change was done

Counter History for last 10 recorded days Session - Total
09/13/2008 98 - 323
09/12/2008 123 - 216
09/11/2008 218 - 255
09/10/2008 139 - 159
09/09/2008 414 - 470

Also in just over 1 year total hits is with only 18 sales !

Statistics
Hit Counter Started: 06/20/2007
Hit Counter: 57900

There is something more then assuming it is search engines as the cause or there is a bug in preventing spiders to crawling through the frontstore
As it is clear spiders are still allowed to create sessions

00:29:540 ¥Spider 66.249.67.10609:51:0910:05:00 Time Since Clicked:
00:16:03 agoSession ID:
Host: crawl-66-249-67-106.googlebot.com
User Agent: Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
/fstore/index.php?main_page=product_info&products_id=3