Try this, it may be an incompatibility between 2.17 and the new SPL that was installed by 3.16. This thread gives info on re-installing the old stock SPL.
http://forum.ppcgeeks.com/showthread.php?t=12041
edit: looks like RootWind and I were doing the same thing at the same time, and somehow came up with two different thread numbers for the same thread, so take your choice