I'm using V.0.7 of your plugin and I changed the shortlink of 'amazon' to 'amazon.com' to be able to distinguish between a link to Amazon.com and Amazon.de.
The link didn't work so I had to change it to 'amazon-com'.
Maybe you either want to add a validation for the name-field (I'm sure there are more chars which break the function) or at make it working with all kinds of special chars in the name.
Besides that I really like your plugin and use it a lot.