I've got a minor problem with my copy of the latest release (downloaded yesterday, 14th).
The text alongside the lighty-up-bits in places like the techroom, etc. (the bits that identify the buttons) have a tendancy to vanish at random intervals. They return soon thereafter.
Slightly more worrying is the fact that my HUD is displaying the same behaviour (interestingly, only from 1st person). It too returns after a short time, or when I fire a weapon.
Knowing my computer, this is probably something unique, but I thought you'd better know.
System:
Athlon XP 1600
384Mb DDR
64Mb GeForce4 MX440
Recent nVidia drivers
Win 98 SE.