We are using 6.0 from late april. But we also had this problem wite 5.3. Does InsertImage and InsertImage from gallery(thumbnails) have the same way of loading / getting images?  The error message that we log are(I have removed server address): (url="/admin/CuteSoft_Client/CuteEditor/Dialogs/InsertGallery.Aspx?IsFrame=1&setting=!3wEWBAUFbmItbm8FAyRhMRUFGXNlY3VyaXR5 OkltYWdlR2FsbGVyeVBhdGgZc2VjdXJpdHk6TWVkaWFHYWxsZXJ5UGF0aBlzZWN1cml0eTpGbGFzaEdhbGxlcnlQYXRoHHNlY3VyaXR5OlRlbXBsYXRl R2FsbGVyeVBhdGgZc2VjdXJpdHk6RmlsZXNHYWxsZXJ5UGF0aBUFE34vLi4vQ2xpZW50L0ltYWdlcy8Ufi8uLi9DbGllbnQvVXBsb2Fkcy8Ufi8uLi9 DbGllbnQvVXBsb2Fkcy8Ufi8uLi9DbGllbnQvVXBsb2Fkcy8Ufi8uLi9DbGllbnQvVXBsb2Fkcy97QETbuZ3PDqYfXHgS bA2uh!3rCGg!2!2&C_GP=/admin/../Client/Images/horse.gif) thanks