Thanks for contacting us and I’m very sorry to hear that you’ve run into this issue!
Under Safari on the most recent versions of OS X, Ribbet has to use a special technique to save due to an Adobe bug which otherwise causes the browser to crash. This issue is affecting all online photo editors as well as other sites that need to save files to your computer using Flash.
Normally with the workaround we have in place the save still works seamlessly, but if you’re having issues then make sure you can see your image on the Library > Uploads tab. If you can it should save, but if it still won’t I’d suggest using a different web browser such as Google’s free Chrome browser or Firefox as this will be a sure-fire solution given that these browsers use our standard save technique.
Let us know if we can assist further in any way!