LG flashing updates are appalling, and they have done NOTHING to put it right. I had the same problem, and had to send it back to LG at Renfrew (Scotland, just over the border) and I got it back a week later, fine and dandy, with the Gingerbread update on it. Will I try the ICS update ? I have doubts.
BUT - if it looks as if it's taking a while to download (my failed upgrade took 3 and 3 quarter hours to download - thats appalling for DIAL UP) then I'll stop it there and then but I dunno....