chevy01xtreme,
yes, you should keep data/ folder with 0777 permissions. There is an .htaccess file in that folder that prevents opening files directly from it.
hugh_,
you can setup log pruning in vbseo_sitemap_config.php file:
PHP Code:
define('VBSEO_SM_PRUNE', 0); // logs age in days to prune
sundarmobiles,
do you have vBSEO product installed (it is required).
cykelmyggen,
you should remove the second one.
alessai,
the page I linked above describes exact steps how to change that.