blockcart error

[clrr]

Hello everyone!

I have one tiny problem.After days of working, configuring and adding products, I finally come to an end with my online shop, using the Prestashop platform.Everything's just fine...I tried placing an order and everything works ok.There's only one problem : I checked the server error logs, and found this :

[Thu May 13 12:26:52 2010] [error] [client 188.25.168.118] File does not exist: /home2/smw/public_html/404.shtml, referer: http://www.smw.ro/product.php?id_product=34
[Thu May 13 12:26:52 2010] [error] [client 188.25.168.118] File does not exist: /home2/smw/public_html/themes/free2/img/onsale_en.gif, referer: http://www.smw.ro/product.php?id_product=34
[Thu May 13 12:26:51 2010] [error] [client 86.106.3.155] File does not exist: /home2/smw/public_html/500.shtml, referer: http://www.smw.ro/product.php?id_product=55
[Thu May 13 12:26:51 2010] [error] [client 86.106.3.155] SoftException in Application.cpp:256: File "/home2/smw/public_html/modules/blockcart/blockcart-set-collapse.php" is writeable by group, referer: http://www.smw.ro/product.php?id_product=55
[Thu May 13 12:26:49 2010] [error] [client 86.106.3.155] File does not exist: /home2/smw/public_html/500.shtml, referer: http://www.smw.ro/category.php?id_category=6
[Thu May 13 12:26:49 2010] [error] [client 86.106.3.155] SoftException in Application.cpp:256: File "/home2/smw/public_html/modules/blockcart/blockcart-set-collapse.php" is writeable by group, referer: http://www.smw.ro/category.php?id_category=6
[Thu May 13 12:26:45 2010] [error] [client 86.106.3.155] File does not exist: /home2/smw/public_html/500.shtml, referer: http://www.smw.ro/product.php?id_product=53
[Thu May 13 12:26:45 2010] [error] [client 86.106.3.155] SoftException in Application.cpp:256: File "/home2/smw/public_html/modules/blockcart/blockcart-set-collapse.php" is writeable by group, referer: http://www.smw.ro/product.php?id_product=53
[Thu May 13 12:26:42 2010] [error] [client 86.106.3.155] File does not exist: /home2/smw/public_html/500.shtml, referer: http://www.smw.ro/category.php?id_category=6
[Thu May 13 12:26:42 2010] [error] [client 86.106.3.155] SoftException in Application.cpp:256: File "/home2/smw/public_html/modules/blockcart/blockcart-set-collapse.php" is writeable by group, referer: http://www.smw.ro/category.php?id_category=6
[Thu May 13 12:26:35 2010] [error] [client 86.106.3.155] File does not exist: /home2/smw/public_html/500.shtml, referer: http://www.smw.ro/product.php?id_product=59

And the error goes on and on for every user, and every different IP.I personally haven't "found" any error in the fron office, while "surfing" the shop.I am not that good at PHP and coding, and I was wondering if there's anyone who could give me a hint about this error.From what I know, it's something about the permissions of the "modules" folder, but I'm not that sure.Someone who could "translate" it for me, please tell me if it's ok, or if it's something that needs to be fixed.Thanks!