my 55LB671V has been updated to 04.55.15 yesterday, this is beta build for DE/GB region, Im from CZ
it seems better speed of TV guide and response when Im changing channels. Im using DVB-T only. But still EPG is downloaded just for selected multiplex without any caching , so when you turn off TV you will se empty epg when you start tv again , for 5multiplex you need to change the channel WHY THERE IS NO CACHING OF EPG!!!! e.g. for 1k channesl 1day cache will be 1MB..? the tv has 1GB!!!
and I hope that slim version of webOS 2.0 will be soon