I've had a couple of instances since loading the Beta 1.4 where all my .xlx files have simply dissapeared. They are not in the waste bin (Windows 2k with Norton 2002 installed) and a DOS search comes up blank. This seems to occur when a fairly large file (90 - 100 M) is 99% downloaded, but I've no record of what files as they're all gone. I'm running through a Zone Alarm Firewall so would think it highly unlikely that somebody has gained OS level access to my PC (and if they have, why delete only these files?). Any suggestions? Using 1.4 beta 1 build 453.