Try waiting a bit longer than an hour for replies to technical questions...
Anyway, here's an answer from the FAQ:
QUOTE
Some of your animations work but others seem to get stuck during loading. Any suggestions?
Yep, try deleting the cached file for the page from your internet browser and then have another go at watching it.
I've been asked this a couple of times. I'm not sure what causes this but what seems to happen is that there is some sort of loading error when you first look at the page which then prevents further loading until you delete this and start afresh.
It may or may not be related but this seems to happen more often to people who are watching from a machine with lots of anti-virus software.
http://www.google.co.uk/search?hl=en&q=how...le+Search&meta=That should fix it.