Unusual keyboard behaviour

Hi Guys,

Wondering if anyone can help me? I have a Sun Blade 1500 running OpenBSD
5.0/Sparc64 and with a PCI PGX video card instead of the XVR-600 junk it
shipped with. Once I did this swap it actually became usable as a desktop.

I've installed the Gnome desktop with GDM etc using a very useful guide
from the net. Everything works except the keyboard does random strange
things. It will, for example, keep a CTRL-D in it's buffer after I've
exited a terminal session and I then can't open another terminal without it
instantly closing.

If I've hit enter to execute a command it will not only execute the command
but continue behaving as if I've hit enter 50 times.

Does anyone perhaps have a tip about how I might deal with this? I'm only a
beginner with OpenBSD so it's highly likely I'm missing something obvious
and my Google-fu is letting me down.

Thanks.

Angus