rMBP Hardware Test Shows Memory Error?

[rkdiddy]

This is very strange. When I ran a hardware test (holding down D before the grey screen at startup) it came up I had a memory error. Interesting enough, this is my second rMBP and the first had the same error. Both the first and this rMBP seem to be running fine, but this error is a little concerning.

Is this really an error or something funky with the hardware tester. Will you try this and see if you get the same error.

Specs in my signature...