I've loaded the new Yahoo! widget, and it fixes the original problem posted by deathduk with the missing ABC1 & ABC2 icons, but not bigdan's problem with the missing Prime Northern/NBN icon. When I set the location to Central Coast, and loaded All Channels, the program was also missing the logo for Southern Cross Northern NS(W?) as well as the NBN logo.
All I did (using your fix) was copy the Prime Southern HD.png file, paste a new copy of that file, and rename that to
Prime Northern HD.png. For NBN, simply download the NBN and NBN HD logos here and save them to where you've got the logos, and allow the existing files to be over written.
I'd show you the results with the NBN HD one, but NBN haven't been bothered to install their digital relay at my local transmitter (Rossgole Lookout) as yet (but everyone else...I wonder why?

), so I haven't got the widget set-up to show NBN HD listings as yet. (Ditto with Southern Cross Ten HD, but then no one in SC10-land has that yet either...well most people.

)