Kernel panic with reiser4 for 2.6.18-2

[Devils-Hawk]

reiser4 partition is /, happens during kernel boot, checked the fs 
before boot and was clean. kernel is gentoo-sources-2.6.18-r2.

reiser4 panicked cowardly: reiser4[hotplug(313)]: readpage_tail 
(fs/reiser4/plugin/item/tail.c:426)[umka-2517]: assertion failed: 
!jprivate(page) && !PagePrivate(page)

if u need more info, feel free to ask
regards, devh