AjaxControlToolkit JavaScript resource not including after 4

After upgrading to 4.1, I'm having a problem including the javascript from the AjaxControlToolkit. My homepage is called "home". I'm using the AjaxControlToolkit's ToolkitScriptManager in my masterpage/template. This worked in 4.0.

The following script inclusion comes back as the html of the home page:
/?_TSM_HiddenField_=ctl00_scriptManager_HiddenField&_TSM_CombinedScripts_=%3b%3bAjaxControlToolkit%2c+Ver...

If I add "home" to the URL, the AjaxControlToolkit javascript comes back as expected:
/home?_TSM_HiddenField_=ctl00_scriptManager_HiddenField&_TSM_CombinedScripts_=%3b%3bAjaxControlToolkit%2c+Ver...

I fixed this by changing from the AjaxControlToolkit's ToolkitScriptManager to Telerik's RadScriptManager.

I'd prefer to avoid them since we don't have full licenses for RadControls and it binds these controls to the SF project. However, it's more of principle thing since if I want to use the controls outside SF, I can use the ToolkitScriptManager in my other MasterPages.

I was having this same problem but changing to the radScriptManager did not help me. What did fix this in my case was setting the CombineScripts="false" property on my ToolkitScriptManager. Hope this helps someone else...

<cc1:ToolkitScriptManager ID="_scriptManager" runat="server" CombineScripts="false" />

3 years later and you helped me out, thanks Keith!