A have a number of clients whose thumbshots occasionally disappear for significant periods of time. I re-submit them and get a message "The URL cannot be updated or update is already in progress."

Why would it not be updateable or why does it take so long to update once it existed? I display my clients home pages on my site but their site does not actually use thumbnails. Any clarification would be appreciated.

http://dev.youngatart.ca/clients.shtml

TIA
Jeff Shields

I realize that the update may take 45 days, but why delete the old one and then have nothing to show?

My question was that I request the update and it says it can't de updated. So your answer had nothing to do with my question.