Adam,
Have you resolved this issue yet?
We tried it on several of your examples, and from 4 different computers around North America, with the same consistent result: where there is heavy content, something is tracking keystrokes and processing in background when the user lifts off a key for a second or so. That processing (presumably a thread of some sort) is not returning control to the foreground action for some period of time.
We also tested several examples with V5.3 and none of them exhibit the same problem at all.
Can you please confirm that you are also seeing this result? And can you please give us an idea of when it will be resolved?
We bought into Version 6 assuming it would be working better than 5.3, and we've spent some time now modifying our application to use Version 6.
We have release deadlines that we have to meet, and the keystroke delay is not acceptable for our product.
Thank you
Fred