Crashing after period of continuous typing on external keyboard

After a period of continuous typing I find that Textmate crashes. This happens with a reasonable degree of regularity.

When I am typing a lot I tend to be using the application with an external bluetooth keyboard. It's just possible that this is related to the issue, though I suspect it isn't.

Also, most of the time when I am typing a lot I am typing into markdown documents and this could be related to the bug but it may be a red herrring.