There is a bug in Humfs making ownerships() function misreport grup id (used 
by stat). The fix is in humfs-2.4.26-2-meta_tdb-1.patch.bz2 already so if you 
use that, there's no need to patch.

ps. I have seen lockups during 2.4.26-um2 bootup, redirecting all output (in 
bash for example by "&>") to file or /dev/null ;-) is a quick fix.