doughayman - 8:30 pm on Sep 19, 2012 (gmt 0)
Thank you for your response. I don't block anything, and hence, left out the blank "Disallow" line. However, I added it to try this permutation, and it had no effect.
I had already tried removing robots.txt altogether, and I still get an "Unreachable robots.txt" GWT error msg, when I try to fetch my home page.
I saved my robots.txt file in ASCII format, and the GWT tab shows the content as it should. This robots.txt file has been around forever, as I have not changed it at all recently.
I will go through the GoDaddy interface to see if I can find any log clues. According to Google doc, the "Unavailable" error message, implies a 5xx-level webserver return code.