My friend is still using XP. I uploaded a MozBackup profile of TBird for her to download. MozBackup creates .pcv files (which are zip files, but with the .pcv extension). She could not get MozBackup to accept the downloaded .pcv file -- kept giving her an error. Finally she sent me a screen shot and turns out that when she downloaded the .pcv file from my site, XP changed the extension to .zip!!!! I have never heard of an OS changing a file extension while simply downloading a file! I used XP for many years, and never had this problem. Anyone ever had this happen to them? I told her to see what program is associated with .pcv files... that it sounds like XP's built in unzip program just looked inside the file, saw it was a zip file, and renamed it. But WTF! We spent hours on this, because I never dreamed XP was changing the extension, and could not figure out why MozBackup kept giving her errors!