False Positive ? NAV 2009

Ran a full scan yesterday and NAV 2009 flagged
c:\program files\trojanhunter 4.5\thsec.dll
as Backdoor.Graybird
NAV removed and quarantined the file and I've submitted the file to Symantec. Leaving in quarantine for now. I believe the file itself is necessary to run TrojanHunter guard.

Anybody else seeing this?

It was also removed from system restore by; NAV auto protect today. I assume it loaded into memory with older system restore files present when a restore point was auto made today.

Is there a symantec person able to speak to this?

From googling I see this has been an issue before as well. Norton flagging same trojanhunter file with same Backdoor.Graybird.