Umm… yes I did read your post fully, all you said was that you deleted the files, never mentioned that you replaced them with the files that I had mentioned. and tweeting to notch every day won't fix anything, as if from what I remember, this is now jeb and dinnerbone's thing, sure he'd be interested to hear, but then, this isn't a minecraft issue, unless they want to remake their own LWJGL and sidestep the people who develop that library.
Billy, Mojang does acknowledge this as an actual issue, and they're working on it, but most of the issue is with LWJGL. If you look up in the thread there is a link (https://www.dropbox.com/s/b6gj27dmoyo0h0j/macosx.zip) that will allow you to download a "working beta" version of LWJGL that should fix or minimize these issues, just replace the files in the BIN folder in your ~/Library/Application Support/minecraft/ folder.
Wait, Minecraft now runs on java 1.7 on mac?
Regardless, I have some business applications that don't run on Java 1.7 😞
I'm still experiencing this issue with 10.8.2, and Java 1.6.0_37
I've rebooted before and had it work, but after a while the issue just pops up again.
Is there any way I can get diagnostic or debugging information to paste in?
and now updating to 1.5.1 kills all of the progress that I made by switching the lwjgl.jar file and pretty much brought it to the point where I can walk in a straight line, but the moment i press one key, all other input from the keyboard is ignored.