Comment 19 for bug 732149

Howdy, amateur here. My instinct is that this is not caused by a btrfs inconsistency/corruption/file system problem. The reason why is that I've had this problem twice now and the first time I "corrected" something in grub.cfg and/or reinstalled grub via chroot with liveCD (I'm not clear which did the trick) and it would boot again (after acknowledging a grub error "error: sparse file not allowed") but now I'm unable to do it again :( I have root on subvol @ and I'm using lzo compression. I've been running this since Alpha 1 I believe. I guess every time I update this is going to be a royal pain... Is there any way I can help? If anybody can tell me how to get this bootable again, I'd appreciate it.