@wolfgangn,
when updating to wheezy just the other day, I ran into a problem I had long since forgotten: when using the same stick on different machines, it seemingly leads to the second one not "booting", when, in fact, it just does not get an IP-Address. In netconsole, it will look as if it was stuck at "Starting kernel ..." The reason is the file
Myself, I always remove these two files and never had any problem with that.
when updating to wheezy just the other day, I ran into a problem I had long since forgotten: when using the same stick on different machines, it seemingly leads to the second one not "booting", when, in fact, it just does not get an IP-Address. In netconsole, it will look as if it was stuck at "Starting kernel ..." The reason is the file
/etc/udev/rules.d/70-persistent-net.ruleswhich is newly generated via
/lib/udev/rules.d/75-persistent-net-generator.rules
Myself, I always remove these two files and never had any problem with that.