Description:
On the console, characters are disappearing magically. All characters of the
same value are disappearing at a time, and new characters of that type don't
come back in later input.
As an example, if a "." disappears from the hostname, all "."s on the entire
screen disappear at the same time. In later output of e.g. make, the dots are missing as well.
I might be mistaken about that one, but it seems that if output is scrolling
through a lot, the process of disappearing is slowed down.
A video for the unbelieving can be found at
http://tonnerre.users.bsdprojects.net/social/images/apps/bugs/console-font-disappearing.mov
How-To-Repeat:
Switch to the console and wait some time.