Anthony J. Kroes Nov 10, 2013
Lawrence, I just had the same problem in reverse last week – my home pc showed it but my observatory laptop did not. Problem was that I had two different updates of Guide running. V9 on both machines, but one had the February 2013 update, and the other said Aug 2011! I updated both to the current (June 2013) update and both work fine now
OK - the mystery is more or less solved (if not deepened)! I just checked my observatory computer and comet Lovejoy is there without problems. Its on my 'indoors' laptop that it refuses to show. FWIW I use the 'update comets' facility routinely and I checked the actual file: it shows Lovejoy - but the comet refuses to show on this laptop. However, its not a problem now that's its OK on the observatory laptop.
Thanks to all for guidance (pun!).