well , i may have found a bug.
i am using StromLog script to archive my ioftpd.log and xferstats. file weekly. after this week's archive. the ioXFERLOGPARSE is not working any more, when ever check any rls(all uploaded this week of coz), it only says this rls is too old or never pass this site. and i checked the xferstats file, it's still there and loging. i tried to restart ioftpd, and it still not working.