False alarms corrected?

Just happened to check the NOD32 scanner logs, and saw that three days ago (3/25), during scheduled system scan, NOD32 identified the following:

C:\Program Files\WinAce\arcicons.dll - Win32/PSW.Barrio.50 trojan
C:\Program Files\WinAce\zficons.dll - Win32/PSW.Barrio.50 trojan
number of files scanned: 30458
number of viruses found: 2

Here's the weird part. Context scans (with and without /ah) today do not identify anything wrong with those files.

Could the signature database update (20040326) have fixed a false alarm? If not, then what did happen?

Any thoughts would be appreciated.

Regards
Optigrab