The space bar on my keyboard.
It's very noisy, I've tried padding it with foam but then you have to hit it harder.
Very happy with everything else that I have.
Athlon 64 X2 Dual Core 4600+
Asrock ALiveSATA2-GLAN
Team Elite 2GB DDRII 800 Dual Channel
Hitachi 160GB SATA II 8MB cache
EVGA 256MB 7900GS KO
SB Audigy 2 ZS + Altec Lansing VS4121
Philips DVD RW
ThermalTake XaserIII V1000A Super Tower - 7x 80mm, 2x 120mm fans, Blue Cold Cathode, Scythe Kama-Meter
Belinea 22" Widescreen @ 1680x1050
OS: Ubuntu 7.04 64bit