Erik,
Thanks a lot for your fix. I used because I found the same error when copying a page in version 7.4.2 (english - default)
Notice tht the correct path is DesktopModules/Admin/Tabs/ManageTabs.ascx.cs
And in case someone wants to edit with just Notepad you search for BindSkins(); and add the 2 lineas so it will look like this:

BindSkins();

if (PortalSettings.SSLEnabled)
{
chkSecure.Enabled = true;
chkSecure.Checked = Tab.IsSecure;
}
else
{
chkSecure.Enabled = false;
chkSecure.Checked = Tab.IsSecure;
}
var allowIndex = false;


startDatePicker.SkipMinMaxDateValidationOnServer = true;
endDatePicker.SkipMinMaxDateValidationOnServer = true;

Regards,
Fred

I deleted the duplicates and fixed the previously provided SQL statement.

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Cheers from Germany,
Sebastian Leupold

   

Speed up your DNN Websites with TurboDNN

I am glad you were able to fix it.
Have fun using DNN :)

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Cheers from Germany,
Sebastian Leupold

   

Speed up your DNN Websites with TurboDNN