say that they are unaware of this issue.
EDIT: What difference does it make whether the particular Apple representative you talked to has seen this before? You want it fixed!
My advice remains the same:
Present your computer at an appointment at the genius bar. If it has ANY problem, however bizarre, known or unknown, heard of or never heard of or never seen before in any computer -- if you can reproduce it, they can fix it.
They will do this by swapping parts under warranty until the problem goes away completely. If a part that still exhibits this problem is installed, they will swap that part out under warranty as well. IF (and only if) you exceed the number of repairs allowed or the "time in shop" under local "lemon-laws" and it is still not fixed, you will be entitled to a new computer, but will likely have to know what your local laws are, and ask the store manager to intervene.
If enough users would do this, the pile of repairs for this issue would start to mount up, and Engineering would be called in to investigate. Sit on your hands and it will never rise to a high enough level to get fixed systematically, AND it will continue to annoy YOU.