I even reported that one to Mark, about a day before he left on his trip. I had a problem where the input would freeze and then all my keypresses would get buffered and all spill out about 60 seconds later.
Haven't had it happen lately, though. Two things to try:
1) Make sure you have his latest kernel from his web site.
2) Disable the high temperature warning.
I think that the second one fixed a few problems I was having. I think the temp-sensor-reading was locking occasionally and messing up other things. Not certain, though.