Radio Calendar Bug Fix…
There seems to be a bug in Radio that if you don’t post to the main page on the last day of the month and only to a category on the last day of the month, you’ll get a 404 page error. I had the same thing happen to me at the end of August. TweezerMan posted the problem about the Radio weblog calendar bug in greater detail
There are two work arounds available for it: First workaround option: Open your www folder, then open the 2003 folder, then the 10 folder, copy the 30.txt file and paste into the same folder, rename it to 31.txt, open it and change the following the #archiveDate to “2003/10/31” and save
Second workaround option: open radio, from the desktop page (the editing page) enter the following: http://127.0.0.1:5335/2003/10/31 click the edit this page button and insert a post, save. This puts a post on the last day of the month for your main blog.