I modified the code in the script to fix this oversight. Steve just needs to release the updated code. Here it is here as well:

SELECT

I.NTUserName,

I.loginname,

I.SessionLoginName,

I.databasename,

Min(I.StartTime) as first_used,

Max(I.StartTime) as last_used,

S.principal_id,

S.sid,

S.type_desc,

S.name

FROM

sys.traces T CROSS Apply

::fn_trace_gettable(CASE

WHEN CHARINDEX( '_',T.[path]) <> 0 THEN

SUBSTRING(T.PATH, 1, CHARINDEX( '_',T.[path])-1) + '.trc'

ELSE T.[path]

End, T.max_files) I LEFT JOIN

sys.server_principals S ON

CONVERT(VARBINARY(MAX), I.loginsid) = S.sid

WHERE

T.id = 1 And

I.LoginSid is not null

Group By

I.NTUserName,

I.loginname,

I.SessionLoginName,

I.databasename,

S.principal_id,

S.sid,

S.type_desc,

S.name

I overlooked the fact that the Path stored in sys.traces includes the numeric extension to the file name. The CASE strips the numeric portion of the file name.