Hi Markus Berchtold,
Thank you for using our services.
I have taken a look at your master page and have noticed that you have an image button control (ImageButton1)
with a post back URL set. This is the cause of the issues. For more information on the issue please take a look at the following KB article: Sitefinity page freezes in Edit mode
To fix this I suggest instead of setting the post back URL property of this control in the master page markup to set it in the code if the page is in live mode. Consider the bellow sample code to do the required:
|Imports Telerik.Cms.Web |
|Partial Class App_Master_normal |
| Inherits System.Web.UI.MasterPage |
| Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load |
| Dim cmsPage As CmsPageBase = TryCast(Me.Page, CmsPageBase) |
| If cmsPage.PageMode = CmsPageMode.Live Then |
| Me.ImageButton1.PostBackUrl = "~/home.aspx" |
| End If |
| End Sub |
|End Class |
When I applied this to the master page you have set it got working on my end.
If you have more questions, please feel free to contact us.
the Telerik team