The stock keyboard and every single other 3rd-party keyboard that I've downloaded is very inaccurate/buggy. I've experienced things such as letters not activating when I type, and even entire words being deleted as I'm typing. Even the Swype that came stock with the phone is annoying; the auto-corrections are ridiculous. It has no idea how to guess what I'm trying to say.
Because I've had no issues with some of these same keyboards on the Galaxy Nexus, I believe that the issue is in this phone. Other than the typing issues, I love this phone. The battery life is INCREDIBLE. But please, I need help on this typing issue. I hate texting now.. it takes so long to type a message since when I type at my normal speed, the phone can't keep up.
Just fyi: I used to own the Galaxy Nexus until I went through 3 replacements. When I had had enough of that, they sent me the Razr Maxx. I think they call them "refurbished." I never trust pre-owned stuff, but hey, what can ya do.