When I launch Tekkit, it automatically updates the minecraft.net files without asking. It only asks for the modpack and not the minecraft.net files. So pressing "No" to update doesn't help at all.
I saw when it updated, it was downloading "natives.jar". Did any of y'all see that? I'm not sure about the others...
EDIT: In /tekkitmain/bin I replaced all of the files except "modpack.jar" and "minecraft.jar" (and "Installed") and when I launched Tekkit... It checks for updates on minecraft.net and downloads a new "natives.jar"!
Hello, I've been having this problem and seem to not have found a fix, although, I see weird things happen. Here I have a snapshot taken IG:
And here's what it looks like instead of using F2 IG:
Hope this may help a little!