QUOTE(Heimdall @ Apr 7 2012, 01:34 AM)

That's prefectly normal. HeXEn is showing you the real C, the normal boot shows you shadow C. Shadow C has free space, real C is deliberately full to prevent dash updates.
Thanks for the excellent explanation, Heimdall! It makes perfect sense to me now.
Thanks guys, I've learned a lot here the past days!