When I choose to practice "Everything" or one of my cram lists I end up with a mostly blank page (no writing area, no characters/words, clock not ticking, etc). Tried using both Safari and Firefox on Mac - same results.

Anyone else seeing this?

Flash is failing to load or initialize. A few questions:

Are you in China?
Does it do it both on skritter.com and skritter.cn?
Are you seeing any JavaScript errors in your browser error console?
Does this link load at all? (it should just have some grey junk in the upper left):
http://skrit.appspot.com/swfs/skritter.swf
Is this from a work computer or home computer? Could there by any firewall stuff going on?

Hope to get this fixed for you!

Well, of course now it works.

I was using skritter.com at the time (I am in China). I tried both this morning nd both are working. I was experiencing slower than usual network performance last night impacting Skype and iTunes downloads when I was using them.

It's my own computer and there is no firewall (except of course the obvious one).

Oh well, I'll use your suggestions to debug if it happens again. Now, off to practice.