I hope you have a backup. The Markzware suggestion is a good one but it's not free.
You may want to give this a read for future use: http://boblevine.us/why-i-always-save-files-in-dropbox-and-why-you-should-too/
Jeffrey Smith's solution is good. You should know that it costs $/EU19 for Markzware to look at the file. (Their In-Take fee.)
Then, if they can recover 50% or more of the file, it costs, at the minimum $/EU99 to get the fixed file from them. This price can go up depending on the MB size of the file. But they don't want fonts and images, so it's just the size of the ID file.
It may seem like a lot if you're a freelancer, or a small design shop, but to get lost work back, it's priceless.
You know, Bob, I've read that article before, but the previous version part never registered.
Let me spell it out in simple language for everyone:
- Dropbox is more than a file sharing service
- When you store a file on your Dropbox, it is on your machine, AND on their servers
- If your file, on your machine is damaged, you are not screwed.
- Dropbox saves the previous 30 day history of the file.
- THIRTY DAYS. So if corruption snuck in a week ago, you're not screwed.
- You can go up to your Dropbox account via the browser and get at the recovered files!!!
- Bob Levine is a genius!