Okay, have run a debug log on both machines.
This is from the non working machine. As you can see, it retrieves the listing okay but something's amiss when trying to start the video.
Any help and advice very gratefully received
18:04:57 T:2428 M:1159421952 NOTICE: search:
18:04:57 T:2428 M:1159421952 NOTICE: Looking for episodes for: 8 Out of 10 Cats
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3256485
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3256464
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3254667
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3242701
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2934002
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2934003
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2934004
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2934005
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2934006
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2934007
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2934008
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2934009
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2934010
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2934011
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2934012
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2934013
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2934014
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2934015
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2934016
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2933738
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2933739
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2933740
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2933741
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2933742
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2933743
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 2933744
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3053639
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3053640
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3053641
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3053642
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3053643
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3053644
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3053645
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3127106
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3147360
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3154305
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3147358
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3147357
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3147356
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3147355
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3147359
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3245825
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3245810
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3245820
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3245816
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3245817
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3245831
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3245827
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3245819
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3245811
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3245826
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3245830
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3242701
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3254667
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3256464
18:04:57 T:2428 M:1159196672 NOTICE: FOUND id: 3256485
18:04:57 T:1420 M:1159131136 WARNING: XFILE::CVideoDatabaseDirectory::GetLabel - Unknown nodetype requested 6
18:04:57 T:1856 M:1159114752 WARNING: XFILE::CFileFactory::CreateLoader - Unsupported protocol(plugin) in plugin://plugin.video.4od/logo.png
18:04:57 T:3660 M:1159114752 WARNING: XFILE::CFileFactory::CreateLoader - Unsupported protocol(plugin) in plugin://plugin.video.4od/../logo.png
18:04:57 T:1856 M:1159114752 WARNING: XFILE::CFileFactory::CreateLoader - Unsupported protocol(plugin) in plugin://plugin.video.4od/logo.png
18:04:57 T:3660 M:1159110656 WARNING: XFILE::CFileFactory::CreateLoader - Unsupported protocol(plugin) in plugin://plugin.video.4od/../logo.png
18:05:00 T:1136 M:1158766592 NOTICE: -->Python Interpreter Initialized<--
18:05:00 T:1136 M:1158660096 NOTICE: ep=3256464&title=Series+12+Episode+7&fn=8-out-of-10-cats.s12e07
18:05:00 T:1136 M:1158660096 NOTICE: search:
18:05:03 T:1136 M:1159000064 NOTICE: PLAYING: rtmpe://ll.securestream.channel4.com:1935/a4174/e1/?ovpfv=1.1&e=1321294205&ip=80.0.155.232&h=0eead77c777199538c84b1b29e321686 playpath=mp4:xcuassets/CH4_08_02_900_52899007001001_001.mp4?e=1321294205&ip=80.0.155.232&h=0eead77c777199538c84b1b29e321686 swfurl=http://www.channel4.com/static/programmes/asset/flash/swf/4odplayer-11.8.5.swf swfvfy=true
18:05:03 T:1420 M:1158201344 NOTICE: DVDPlayer: Opening: rtmpe://ll.securestream.channel4.com:1935/a4174/e1/?ovpfv=1.1&e=1321294205&ip=80.0.155.232&h=0eead77c777199538c84b1b29e321686 playpath=mp4:xcuassets/CH4_08_02_900_52899007001001_001.mp4?e=1321294205&ip=80.0.155.232&h=0eead77c777199538c84b1b29e321686 swfurl=http://www.channel4.com/static/programmes/asset/flash/swf/4odplayer-11.8.5.swf swfvfy=true
18:05:03 T:1420 M:1158197248 WARNING: CDVDMessageQueue(player):
ut MSGQ_NOT_INITIALIZED
18:05:03 T:592 M:1158127616 NOTICE: Creating InputStream
18:05:03 T:592 M:1156710400 WARNING: HandShake: Type mismatch: client sent 6, server answered 9
18:05:03 T:592 M:1156702208 WARNING: HandShake: Server not genuine Adobe!
18:05:03 T:592 M:1156702208 ERROR: RTMP_Connect1, handshake failed.
18:05:03 T:592 M:1156702208 ERROR: CDVDPlayer::OpenInputStream - error opening [rtmpe://ll.securestream.channel4.com:1935/a4174/e1/?ovpfv=1.1&e=1321294205&ip=80.0.155.232&h=0eead77c777199538c84b1b29e321686 playpath=mp4:xcuassets/CH4_08_02_900_52899007001001_001.mp4?e=1321294205&ip=80.0.155.232&h=0eead77c777199538c84b1b29e321686 swfurl=http://www.channel4.com/static/programmes/asset/flash/swf/4odplayer-11.8.5.swf swfvfy=true]
18:05:03 T:592 M:1156702208 NOTICE: CDVDPlayer::OnExit()
18:05:03 T:592 M:1156702208 NOTICE: CDVDPlayer::OnExit() deleting input stream
18:05:03 T:1420 M:1157169152 NOTICE: CDVDPlayer::CloseFile()
18:05:03 T:1420 M:1157169152 WARNING: CDVDMessageQueue(player):
ut MSGQ_NOT_INITIALIZED
18:05:03 T:1420 M:1157169152 NOTICE: DVDPlayer: waiting for threads to exit
18:05:03 T:1420 M:1157169152 NOTICE: DVDPlayer: finished waiting
18:05:06 T:2796 M:1158598656 NOTICE: -->Python Interpreter Initialized<--
18:05:06 T:2796 M:1158492160 NOTICE: category=comedy&title=Comedy+%28107%29
18:05:06 T:2796 M:1158492160 NOTICE: search:
18:05:07 T:1420 M:1158324224 WARNING: XFILE::CVideoDatabaseDirectory::GetLabel - Unknown nodetype requested 6
18:05:07 T:2456 M:1158606848 NOTICE: -->Python Interpreter Initialized<--
18:05:08 T:1420 M:1158361088 WARNING: XFILE::CVideoDatabaseDirectory::GetLabel - Unknown nodetype requested 6
18:05:09 T:1420 M:1149030400 WARNING: XFILE::CVideoDatabaseDirectory::GetLabel - Unknown nodetype requested 0
18:05:09 T:1420 M:1149030400 ERROR: Unable to find plugin extrafanart
18:05:09 T:1420 M:1149030400 ERROR: XFILE::CDirectory::GetDirectory - Error getting plugin://extrafanart/
18:05:09 T:1420 M:1149030400 ERROR: Unable to find plugin ..
18:05:09 T:1420 M:1149030400 ERROR: XFILE::CDirectory::GetDirectory - Error getting plugin://../extrafanart/
18:05:09 T:3212 M:1149370368 WARNING: XFILE::CFactoryDirectory::Create - Unsupported protocol(script) in script://
18:05:10 T:1420 M:1156722688 ERROR: XFILE::CDirectory::GetDirectory - Error getting addons://sources//extrafanart/
18:05:10 T:1420 M:1156722688 ERROR: XFILE::CDirectory::GetDirectory - Error getting addons://sources/../extrafanart/
18:05:13 T:1944 M:1142591488 NOTICE: ### Stopping TvTunes Backend ###
18:05:14 T:2596 M:1140879360 NOTICE: -->Python Interpreter Initialized<--
18:05:14 T:3564 M:1144881152 NOTICE: -->Python Interpreter Initialized<--
18:05:14 T:3564 M:1144848384 NOTICE: {'albums': 'True', 'limit': '10'}
18:05:20 T:1420 M:1160716288 WARNING: Skin has invalid include: dialogeffect
18:05:23 T:1420 M:1159204864 NOTICE: Storing total System Uptime
18:05:23 T:1420 M:1159446528 NOTICE: Saving settings
18:05:23 T:1420 M:1159344128 NOTICE: stop all
18:05:23 T:2676 M:1159344128 NOTICE: VideoInfoScanner: Finished scan. Scanning for video info took 01:00