i recently bought a 28" widescreen tv (200 quid from tesco)
its working fine but does any one know how to keep it on widescreen, when i change channels through sky the picture jumps from widescreen to a small box shape screen. very annoying.
Your Tv is working correctly. Unless the programme or film was recorded in 16:9, the correct viewing format is 4:3. Putting 4:3 material into 16:9 mode results in distorted, unnatural picture (most noticeably, everyone has fat heads!) . As others have said, you can adjust the sky settings, ideally it should automatically detect 16:9 or 4:3 and adjust the pic.