Haven't checked the upgrade thing yet,HOWEVER I turned off 'auto' changed it to a manual channel and ITS WORKING! yayy
I'll keep an eye on it and see if it lasts though.
(oddly enough I had set it to a manual channel some time previously, I suppose a firmware update had put it back to Auto?) it's not the sort of thing you look out for until there's a problem.
I think my area isn't due for the update until June.