Yes, we were recently able to trace this issue and it turned-out to be an intermittent bug in the TVN fares engine.
Clearing MSIE cookies, deleting Temporary Files (via Tools -> Internet Options), and restarting the Tool should help bring it back to normal.
HELP!
Sabre Fares TVN
330 day fare issue is back
Deleted IE Temp Files including off line
Deleted the Travlocity Cookie
Windows XP date is correct
Does not resolve
OR I now get
Error Requesting Data
Waiting for Response
Request sent
[9001} Time Out Requesting Data
All other features appear to work