modifying "Image-Link" makes bad behaviour with Ckeditor

[datiswous]

Tried to reproduce, by using toolbar code and installed and activated same plugins, still can't reproduce (btw, I't's not that I don't believe you, but it's nice to have a starting point).

You use the GSckePatch to activate Ckeditor 4.4.7 . Maybe you can disable that plugin and update your installation to the beta 3.3.9b3 which uses Ckeditor version 4.5.7 as the main editor (that's what I use at the moment). See if that might make the difference.