Same here with Microsoft Wireless Multimedia Keyboard 1.1 Model 1014 running debian6-19-04-2012.img ("squeeze").
It's so bad that it takes about 5 attempts just to login.
It seems to be a software problem as I get NO STICKY KEYS
, and the sticky problem seems to be less when running
ArmedSlack-13.37-18-05-2012.img, but that last one's rather subjective.
RPi configured thus:
Voltage between TP1 and HDMI Socket Body: 4.88V
Ethernet: cable connected and running
HDMI: cable connected and in use to PC DVI monitor
PSU: Masterplug Surge Protected USB Adaptor 2 x 1A USB Polished Black http://tinyurl.com/bng88eu
SDHC: Kingston 8Gb Class 4
USB1: Connected to Microsoft Optical Desktop Reciver 2.1 Model:1028
USB2: Nothing connected