At midday today (or there about) the update of Freeview took place, shifting a few of the channels between multiplexes and also to add a new channel from Discovery, Quest started broadcasting at midday today. To continue to receive the channels, everyone with a Freeview receiver needed to retune their box / tv / capture device.
If channels appear to be missing, try a full channel rescan to see if they re-appear and / or start working again. However, for some, this upgrade may cause the lose of ITV3/4 for some users and certain models by Daewoo, Labgear, Triax and Bush could possibly stop working entirely. A full list of problematic hardware can be found at the BBC, http://news.bbc.co.uk/1/shared/bsp/hi/pdfs/29_09_09_freeview.pdf
This upgrade is to pave the way for trails of Freeview HD later in the year.
Did you have any problems with the retune? Anything exciting to report?