BuddyPress.org

@paduy –

If your standard WordPress install doesn’t work with custom permalinks (e.g. /%category%/%postname%/)… then your problem is not in BuddyPress.

You need to fix your base WordPress install first of all. BuddyPress won’t work if you don’t have custom permalinks working correctly.

Do you get any error message when you try to configure custom permalinks (e.g. problems accessing the .htaccess file)?