I am working on setting up a new site- and out of no where started getting an error that I can not decrypt.  I thought it had something to do with the pages I created, because I was unable to get the error when I used the browser to go back to an admin or a host page, and I could make site changes from there.  Just can't load up any of my three created pages.  My wife says she saw no errors at all, so I restarted FireFox.  No errors- until I log in. Other logins have the same problem- and now when I log in- it tries to take me to the home page, which doesn't work, so I can't even get back to the admin or host settings pages.  I have not changed anything that I have not changed a hundred times before on a hundred different DNN sites.  Today I was working with a new Skin (that seemed to be working just fine, the error did not happen at the same time) and I was making changes to the logo field in admin-settings.  That seems to be the last thing I did, but when the error first showed up, I was able to change the logo back to nothing, and confirm that my settings saved by viewing the admin page, but other pages still did not work.  Here is the error:

An error has occurred.
DotNetNuke.Services.Exceptions.PageLoadException: The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>). ---> System.Web.HttpException: The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>). at System.Web.UI.ControlCollection.AddAt(Int32 index, Control child) at DotNetNuke.UI.Skins.Skin.Page_Init(Object sender, EventArgs e) at System.Web.UI.Control.OnInit(EventArgs e) at System.Web.UI.UserControl.OnInit(EventArgs e) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.AddedControl(Control control, Int32 index) at System.Web.UI.ControlCollection.Add(Control child) at DotNetNuke.Framework.DefaultPage.Page_Init(Object sender, EventArgs e) at System.Web.UI.Control.OnInit(EventArgs e) at System.Web.UI.Page.OnInit(EventArgs e) at DotNetNuke.Framework.PageBase.OnInit(EventArgs e) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace ---

As in restart it via Host > Host Settings?

Or reboot my server?

I think it might be skin related, as it goes away when I switch back to a default skin.  Does this kind of error normally "pop up" because I was working fine all morning with the skin in place, and then the error surprised me.