I create one post in my first blog EUSKO with a modified .htaccess file for those who have problems accesing pages after install of the php link bid directory script on some hosting servers here : http://eusko.org/htaccess-problem-phplb/
Check these - http://support.intavant.com/phplb/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=13 http://support.intavant.com/phplb/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=15
Thanks Mikey, But those links didn't help much. I've deleted and uploaded the .htaccess several times (checking the contents to make sure it was the default that came with phplb). I ended up moving to a new host. I think the shared environment threw off the mod_rewrite. Thanks anyway!