Unfortunately, I already cleaned out all the kernels. If it helps any, the kernels I cleaned out were 3.2.0-12 through 3.2.0-22, leaving behind just 3.2.0-23 and the 3.2.0-24 kernel I am running on. Ubuntu Tweak still recognizes 3.2.0-23 as able to be cleaned out, but at least now it reports the memory size correctly.
Unfortunately, I already cleaned out all the kernels. If it helps any, the kernels I cleaned out were 3.2.0-12 through 3.2.0-22, leaving behind just 3.2.0-23 and the 3.2.0-24 kernel I am running on. Ubuntu Tweak still recognizes 3.2.0-23 as able to be cleaned out, but at least now it reports the memory size correctly.
Perhaps it was an overflow of some sort?