[popcornmix]

You have a corrupt database:

Code:

17:03:10  33.181946 T:3038581280  NOTICE: Running database version ViewModes6
17:03:10  33.192272 T:3038581280   ERROR: SQL: The database disk image is malformed
                                            Query: PRAGMA cache_size=4096

You should remove that:

Code:

mv .xbmc/userdata/Database/ViewModes6.db .xbmc/userdata/Database/ViewModes6.broken

It should get recreated. I don't think that's related to current problem, but could cause other issues.

You should disable "extract thumbnails and video information"
http://wiki.xbmc.org/index.php?title=Settings/Videos

You are getting an EOF message shortly after starting the file. It could be an issue with updated ffmpeg, or the fast channel change feature.
Can you confirm if this used to work? Does it work with current stable raspbmc?

I've just tried a few wtv files and they are playing fine (including a 10G file).