[tex-live] tlmgr update --self fails

[Martin Schröder]

Hi,
since Monday on Win7, tlmgr asks for --self, but then fails:

C:\Users\ms>tlmgr update --self
tlmgr: using pinning file C:/texlive/2012/../texmf-local/tlpkg/pinning.txt
tlmgr: package repositories:
        main = http://mirror.ctan.org/systems/texlive/tlnet
        tlcontrib = http://tlcontrib.metatex.org/2012
tlmgr: saving backups to C:/texlive/2012/tlpkg/backups
Preparing TeX Live infrastructure update...
cannot set/edit root of a virtual tlpdb
Backup option not implemented for infrastructure update.
TLDownload::get_file: response error:
  404 Not Found
permanent server connection set up, but downloading did not
succeed!Retrying with wget.
xzdec: (stdin): Unexpected end of input
Couldn't unpack texlive.infra.tar.xz
Aborting infrastructure update.

What's up?

Thanks in advance
   Martin