I hate to sound like a total n00b, but if you're using the Siyah Kernel (as I am) there's no need for the MIUI tweaks, as it's not compatible.
Is it possible to remove? And, if so, how? I'd appreciate any insight.
edit to add: One other problem, and I've searched everywhere (or at least I think) for an actual answer to this. I have a Data Usage Warning notification which will not go away. It's kind of frustrating, because it's probably something simple. I tap to view settings, but there's no options at all to disable it.