So exactly how do I setup a 404 error page on my site? It's good practice to use 404 error pages on your site instead of relying upon the built in IIS error handling mechanism and it's not that obvious how to set it up.
When attempting to set the hostname for your site in the Umbraco content tree, Umbraco gives the error: Domain 'xxyyzz' has already been assigned
Publishing nodes in Umbraco can sometimes give: Value Cannot Be Null, Parameter Name: Attribute exceptions, here is the solution.
Fixing errors in Umbraco related to the SiteMapProvider in the load nodes. Solutions on how to fix this error are related here.
How to safely delete duplicated rows in SQL Server database without a primary key
Recently we experienced issues where the Umbraco.Config file was not being updated with published content - this had a knock on effect within the API calls we were making to create new nodes if they did not already exist.
No document exists with version error in Umbraco can be caused by orphan revisions in the cmsContentVersion table that are not in the cmsDocument table.
The following article is about Web Development and how the new HTML5 has brought in new changes from HTML 4.01.
When logged in to the Umbraco backoffice control panel, you attempt to make a change to a template, but clicking the "Save" button causes the MVC Razor Layout View to be deleted