I get this message occasionally when I try and reinstall something that I've already uninstalled. For instance, the new DockSwap asked me to uninstall before downloading, so I did. Now I get the error message "Package file size mismatch!" when I try and download. Also, I didn't like the new SummerBoard so I tried uninstalling it. When I gave in later to reinstall it, it said the same error message when I tried to download it. What is going on?