Gerrit, Leandro, Bruce, everyone, Gerrit is right - the .exe file at sourceforge.net was too small. I think this must be my fault for uploading too anxiously last friday -- sorry for any trouble. I have now replaced the ifeffit-1.2.8.exe file at sourceforge.net, and the new one is now 27281991 bytes (the same size as the one at cars9.uchicago.edu). I won't be at a Windows machine to test this until tomorrow, but I'm sure this will work better. I do not know how quickly the sourceforge mirrors will update the file, so I've also altered the Ifeffit download page to temporarily not have a link to the sourceforge .exe. I'll change it back in a few days when I know that all the sourceforge versions are the righte size. Again, sorry for any trouble and glad to hear that you were able to work it out! --Matt