More information needed for someone to help... please click these links and provide the requested information
-Information FAQ http://forums.adobe.com/message/4200840
Also, based on another recent discussion, .ts is a "Transport Stream" that is designed for broadcast playback, not a file that is designed to be edited (I don't use .ts, so have no personal knowledge)
What is the source of your file?
Version: Prem Pro CS6 v6.0.0
OS: Windows 7 Home Premium
Source: MPEG-2 TS (.TS)
I've always recorded and edited in this format, so I don't know why it hasn't worked.
Update: Just installed the update, didn't know there were any! It appears to have fixed it, thanks for letting me know! Hopefully it doesn't happen again, but I'll be sure to come back if it does.