Here's the full error after trying to click 'Browse Server' in FCKEditor:

RawURL: /Providers/HtmlEditorProviders/FckHtmlEditorProvider/fckimagegallery.aspx?FCKTheme=Default&Type=Image&tabid=36&RootFolder=/Portals/0/&CurrentFolder=/
AbsoluteURL: /Providers/HtmlEditorProviders/FckHtmlEditorProvider/fckimagegallery.aspx
AbsoluteURLReferrer:
UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.0.3705; .NET CLR 1.1.4322; Media Center PC 4.0; .NET CLR 2.0.50727; InfoPath.1)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 1c13e545-441e-4b7c-a4e5-fcdc7f6fa992
InnerException: String cannot be of zero length. Parameter name: oldValue
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.String.Replace
StackTrace:
Message: DotNetNuke.Services.Exceptions.PageLoadException: String cannot be of zero length. Parameter name: oldValue ---> System.ArgumentException: String cannot be of zero length. Parameter name: oldValue at System.String.Replace(String oldValue, String newValue) at DotNetNuke.HtmlEditor.FckHtmlEditorProvider.FCKGalleryBase.Page_Load(Object sender, EventArgs e) at System.EventHandler.Invoke(Object sender, EventArgs e) at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace ---

Thanks. I tried that with the 'Recursive' checked. When I click on the + next to the 'Portal Root' folder, the AJAX icon spins, then no Folders are shown underneath.

I also still get the same error on clicking 'Browse Server' in the FCKEditor.

It looks like things are out of synch between FS and DB - is there any way to flush the DB of the File Structure that it thinks it has and repopulate it from the FS?

I guess that's what the manual Synchronize Files is suposed to do but it's not having any effect.