Bug#633725: debian-installer: On IBM x3650 M3 debian installer, language selection broken
I have the same issue, with two current Supermicro Intel Servers. Had it
with an earlier Squeeze installer version, too, so it's not a recent
change that causes the bug.
12 CPU cores with Hyperthreading enabled (=24 virtual CPUs), 144GB RAM.
Some overflow when judging the available memory perhaps?