I just wanted to document this for other users, that don't look at the write (http://make.wordpress.org/core/2012/12/12/php-warning-missing-argument-2-for-wpdb-prepare/)
"So, this is a new warning in 3.5. No sites are broken, everything is fine as before. But, this is indeed something you need to look at, because you may be exposing your users to a possible SQL injection vulnerability. Now that’s no fun!"
If you see this error at the top of your plug in, "Warning: Missing argument 2 for wpdb::prepare(), called in"
According to this write up, the plug in is unsafe, and might make you open for SQL injections.
Till it's fix I would turn it off, less you look at http://wordpress.org/support/topic/missing-argument-2-for-wpdbprepare-17?replies=13
for a manual fix.
I'm sorry, but I had to bring this to the attention of others.