I was trying to add a mnemonic to a word just now, and some of the keys weren't registering. First I thought it was a problem with my laptop's keyboard, so I tried my external - no dice. Then, I tried the address bar, and the letters showed up just fine. Other text boxes on the internet, no problem. I came to the forum to post an error report, and found the same problem here as well. So now I'm typing up the post in Notepad to paste into the forum.
I'm using Chrome 5.0.375.70 beta on Win 7 HP.
Following is the alphabet typed in the forum's text box to show which letter keys aren't responding.
c d e f g h i j k l o p q r s t u v w z