Maybe you guys haven't noticed yet but a new version of YAFB has just been released

This version focuses on fixing minor bugs which are reported in this thread earlier. The script is now smart enough to switch to a less secure way to run and prevent this kind of error messages
Code:
Warning: tempnam() [function.tempnam]: open_basedir restriction in effect. File() is not within the allowed path(s): (/some/path/) in [path]/includes/class_upload.php on line 275
Warning: fopen() [function.fopen]: Filename cannot be empty in [path]/includes/class_upload.php on line 281
Another addition is the navbar link will now display on both CMS and Blog if they are installed
Ahh, talking about Blog, who has Blog on your site should check this Add-On:
Publish Blogs to Facebook. It's still in beta stage (the primary purpose is for demonstration) but it works like a charm (try it now on the vBulletin 4 demo board!)
Regards,