Well, I found something :
For the Dev:
problem seems to be with the 'tests' on checkboxes when formating partitions...
When checkboxes are unchecked, installation will fail... (see error message)
When checkboxes are checked installation is starting (no error message)
I guess it's something like this : if Checkbox is selected then ext="Whatever" "Mkfs." & ext
when Checkbox is NOT selected then ext="" and you get the string "mkfs." & ""
Am i right on this point ?
also next step of installation:
if Cd-rom is not mounted, installation will fail, probably need also a check in the Javascript.
@Ceel : Installation goes fine with Ext4...
Hope that will help.
BTW : for the dev, You guys are rocking. slitaz is My favorite Distro, I discovered it with Release 3, and you did wonderfull work with Release 4.
Small, fast, and working (much easier to set-up than previous one)
Thumbs up for you Guys.... !!!!!!!