First of all, thanks for your reply!
I had added a page named "Community." I edited the contents of the Community page using the RadEditor and added the meta Refresh tag within <head></head> tags.
However, when I submitted the change, the browser window began redirecting to the fake page name in the meta Refresh tag. So I figured, I would just close the browser, reopen it, and edit the page removing the meta tag.
But, after closing and reopening the browser and going to the default.aspx page, it did the same thing - redirecting to the fake site. I was only able to get into DNN by hitting the browser Stop button to prevent the page from redirecting to the fake page.
I was able to delete all the pages except the Home page. That's the only page I wanted to save because I had done a lot of work on it. I was able to edit the Home page contents and it was blank. However, I got the following error in a popup before the RadEditor was displayed -
Error! Set EditContentAreaMode to Iframe if you want to edit full page HTML.
I would think that might be telling me that I'm unable to see some HTML in the Edit area thus not being able to see the meta tag in order to delete it. I have no idea what the error means or how to make the change to remove the error.
I was also getting this error when I tried to edit the Community page where I had entered the meta Refresh tag. I saw nothing in the RadEditor but I did delete that page and it does not show as a page on the site any longer.
Something funky is definitely going on here. I am dead in the water and unable to further work with my site. I'm really scratching my head how that one meta tag could have caused this problem.