I just received a response from Gavel snip support:
> Unable to execute snipes. States invalid auction site login or
> password.
This is fixed. eBay made changes to their site code that processes
logins. You may need to update your eBay credentials.
READ THIS ENTIRE MESSAGE
Your GavelSnipe.com username/password and your eBay (or other auction
account) username/password have nothing to do with each other even if
you have set them to be the same (not recommended).
GAVELSNIPE.COM USERNAME/PASSWORD
Your Gavelsnipe.com username is permanent, unique and can't be changed.
We'll see