On machines with Tulip and VIA-Rhine LAN cards I have successfully installed 6.1 for i386, and the installer has auto-detected the LAN card. When I try on machines with NE2000 cards, the card is not auto-detected. When I manually select the NE2000 driver I get a "resource busy" message. Another point. When I reach the point of setting the FTP parameters for install, the option to set a specific login ID and password (rather than anonymous FTP) seems to have disappeared in 6.1 Like a lot of others reporting here, I also get lots of Python errors when trying an upgrade. Only a fresh install seems to work, but this is hardly a fresh bug report.
*** This bug has been marked as a duplicate of 5521 ***