Hi!
I've encountered a rather annoying problem after flashing ICS on my Desire. Every 100 words or so, the keyboard stops responding to taps, even though the process itself is responding. If I mash a lot of buttons on the edges of the keyboard - tapping two keys at once (right and left side simultaneously), the keyboard eventually starts responding again.
I tried disabling multitouch support today, and haven't encountered the bug since then.