I'm having problems with the debian buster install. I keep getting the same error: libdevmapper corrupted when installing the base system. I'm thinking this is a temporary problem with weekly iso build. I checked the iso md5 on the file and after writing to the install media. I did this with 2 different installation USB drives. Got the exact same error with both. Any ideas?

It's not uncommon for the weekly builds to have issues.
Maybe try the previous one or wait for the next.

edit: maybe they don't archive the previous builds...

You could also use the mini.iso from http://ftp.nl.debian.org/debian/dist...mages/netboot/ and choose testing from the expert install.

I think it was a problem with the weekly build. Unfortunately, I did have time to wait. And even though I have a local mirror, I could not use jigdo, because that uses a snapshot of the mirror. So, although I had a newer, correct deb file on disk, the jidgo file specified the incorrect file and fetched it from the remote mirror snapshot. I probably could have tweaked it and rebuilt the jigdo and template files. But I didn't.

Now I'm stuck with stable, which isn't very exciting. But at least it's patched for spectre and meltdown, which was the whole thing that started this mess.