I noticed that the button for deleting synths is gone. Well, it's still there, but it's invisible because the image is not on the server anymore: http://mslabs-999.vo.llnwd.net/inc/images/delete_x_over.png
thanks for taking the time to give feedback. For the missing delete button issue we do have a fix that will be part of our next release, which will make deleting synths a bit more obvious :-)
This issue has been fixed. The delete button should be showing up again.