Well normally everything works perfectly fine with the custom client wrapper, but for some reason the hacks don't work at all.

I've never been able to use noclip because I have yet to find a server that has it enabled...So I can't report on the status of it.
Flying won't work. Z then Q and E do nothing, I've tried multiple times.
Holding Ctrl or Left Shift do nothing anymore.

It was working perfectly fine yesterday.
I have not installed any new software.
In the past day the only things that have happened are me browsing the internet and playing a few games through steam. Nothing new installed, nothing uninstalled.

It DOES work in single player. Not multiplayer though.
The server I have been testing this on DOES support hacks and has them enabled (except noclip)
I have re-downloaded the client and minecraft.jar twice and it hasn't worked.
I have not seen any errors from java, or from the .bat
The "Enable Hacks" box is checked, and I've even tried checking and unchecking it.

What gives?

EDIT:

Only minecraft-related thing I can find to this is Notch released an update to minecraft, could this be it?

http://notch.tumblr.com/