I just tried to install 6.0 beta3 iso on a celeron machine with a 30 gig drive and 128 meg ram. Its my test machine and has had at least 20 different linux installs in the past 2 years. Beta3 reports that it needs an additional 575 MB of space to install. Not likely on a 30 gig drive.
Just to be sure it was not something with the drive I ran the diagnostic disk and did a full low level format of the drive (Wrote all zeros to the drive). Still giving the same error. Just to be sure, installed 5.6 on the machine. No problem.
I did a quick search of the archives and do not see anything promising. Any suggestions on how to get past this error? I will submit a bug report if this is not a known and fixed problem.
TIA, Bill