I tried the latest usb and cd files (6.0.3) and the bug is still not solved !
Is it possible to install without "partman"? It is just broken! I don't like software which tries to do magic, and fails without giving any information to the user. The remebers me why I left windows, when there was fileMAN and progMAN. Debian equally fails with partMAN and NetworkMANager. Please make those broken Wizards optional for installation. The bug is 100% reproducible on any hardware I tried, when I install from usb stick. The easiest work around I found is: Before the installer starts this broken partman, I have to remove /dev/sdb* (the usb stick device)