I have the same issues with canola2 and ukmp. It loads a lot of data, rather fast now (9.3MB / 5.5MB) in 20-30 secs, then the message "installationsdatei korrupt" which means in english: the install-file is corrupt.
I had this after a new flashing of os2008 without restoring anything from older installation.
I had this after loading repos from canola and / or maemo.
It's not only a bandwidth-issue, it's a real issue of one of the repos.

Edit: How to get a non-corrupt install-file??