@Superku: I always use the right (red button), debug run.
I just tested using all three Current, Test, and Debug... Still no sign of it in my log unless I mark first.

@Uhrwerk: Sed says I'm using 8.10.1, acklog.txt files say im using 8.20.1 ... About time I updated I guess...

EDIT: After the update my log indicates version 8.40.3 and your snippet is indicating the unfreed memory withought needing to mark as you said it should ^^