installation fails due to "lack of disk space"

[Albert]

Hi all,

Installing YDL 4.0.1 in a PowerBook Titanium G4 1GHz (late 2002), my 
partitions are:
	Apple bootstrap 1 Mb
	/	4 Gb
	/extra 3Gb
	/home 12 Gb
	hfs macosx 35 Gb

Then even if selecting the minimal installation, after formatting partitions 
and starting to copy the image to the disk, it reports:
	" Failed to copy image to disk, you've probably run out of disk space" (or 
something very similar)

Please advice.

Albert

PS: By the way it formats the partitions every time, even if they are already 
formatted.