OK, think I got it fixed now. Items with bad links will now just be an image with no link (context menu links will be greyed out). The rest of the items still have links. Also removed the duplicate item (it actually did cause a problem - the item would not have borders if new). Will now also display the text “Checking…” a couple of seconds whenever it checks for new items.
The Back and Refresh buttons are actually only for if you use the browser for browsing other pages, they don’t have any effect on the checking process. If you want to use the browser for browsing I’ll recommend setting the browser compatibility mode, otherwise the pages may look bad. You can do it with this utility: