Been having some problems with Freeview in the past couple of days. Signal is usually very strong around here, +9 so not really a problem. When I switch back from an AV source to Freeview I sometimes get rolling bars or a locked rainbow picture. A few channel changes tends to sort it out, but it seems the Viera has problems locking onto digital channels coming back from an AV source. Not sure if it's the set or the transmission. Anybody else had these or similar problems ?